diff --git a/repos/gems/run/launcher.run b/repos/gems/run/launcher.run
index 7528e7703b..d2e6087079 100644
--- a/repos/gems/run/launcher.run
+++ b/repos/gems/run/launcher.run
@@ -137,17 +137,18 @@ append config {
 		<provides> <service name="Report"/> <service name="ROM"/> </provides>
 		<config verbose="no">
 			<rom>
-				<policy label="decorator_config -> xray"   report="xray_trigger -> xray"/>
-				<policy label="layouter -> window_list"    report="wm -> window_list"/>
-				<policy label="layouter -> focus_request"  report="wm -> focus_request" />
-				<policy label="decorator -> window_layout" report="layouter -> window_layout"/>
-				<policy label="wm -> resize_request"       report="layouter -> resize_request"/>
-				<policy label="decorator -> pointer"       report="wm -> pointer"/>
-				<policy label="layouter -> hover"          report="decorator -> hover"/>
-				<policy label="wm -> focus"                report="layouter -> focus"/>
-				<policy label="status_bar -> focus"        report="nitpicker -> focus"/>
-				<policy label="launcher -> focus"          report="nitpicker -> focus"/>
-				<policy label="xray_trigger -> hover"      report="nitpicker -> hover"/>
+				<policy label="decorator_config -> xray"      report="xray_trigger -> xray"/>
+				<policy label="layouter -> window_list"       report="wm -> window_list"/>
+				<policy label="layouter -> focus_request"     report="wm -> focus_request" />
+				<policy label="decorator -> window_layout"    report="layouter -> window_layout"/>
+				<policy label="wm -> resize_request"          report="layouter -> resize_request"/>
+				<policy label="decorator -> pointer"          report="wm -> pointer"/>
+				<policy label="layouter -> hover"             report="decorator -> hover"/>
+				<policy label="wm -> focus"                   report="layouter -> focus"/>
+				<policy label="status_bar -> focus"           report="nitpicker -> focus"/>
+				<policy label="launcher -> focus"             report="nitpicker -> focus"/>
+				<policy label="xray_trigger -> hover"         report="nitpicker -> hover"/>
+				<policy label="layouter -> decorator_margins" report="decorator -> decorator_margins"/>
 			</rom>
 		</config>
 	</start>
diff --git a/repos/gems/run/mixer_gui_qt_test.run b/repos/gems/run/mixer_gui_qt_test.run
index d5cdf8ceb0..b79ebb2849 100644
--- a/repos/gems/run/mixer_gui_qt_test.run
+++ b/repos/gems/run/mixer_gui_qt_test.run
@@ -77,15 +77,16 @@ append config {
 		</provides>
 		<config>
 			<rom>
-				<policy label="layouter -> window_list"      report="wm -> window_list"/>
-				<policy label="layouter -> focus_request"    report="wm -> focus_request"/>
-				<policy label="decorator -> window_layout"   report="layouter -> window_layout"/>
-				<policy label="wm -> resize_request"         report="layouter -> resize_request"/>
-				<policy label="decorator -> pointer"         report="wm -> pointer"/>
-				<policy label="layouter -> hover"            report="decorator -> hover"/>
-				<policy label="wm -> focus"                  report="layouter -> focus"/>
-				<policy label="mixer_gui_qt -> channel_list" report="mixer -> channel_list"/>
-				<policy label="mixer -> channel_list"        report="mixer_gui_qt -> channel_list"/>
+				<policy label="layouter -> window_list"       report="wm -> window_list"/>
+				<policy label="layouter -> focus_request"     report="wm -> focus_request"/>
+				<policy label="decorator -> window_layout"    report="layouter -> window_layout"/>
+				<policy label="wm -> resize_request"          report="layouter -> resize_request"/>
+				<policy label="decorator -> pointer"          report="wm -> pointer"/>
+				<policy label="layouter -> hover"             report="decorator -> hover"/>
+				<policy label="wm -> focus"                   report="layouter -> focus"/>
+				<policy label="layouter -> decorator_margins" report="decorator -> decorator_margins"/>
+				<policy label="mixer_gui_qt -> channel_list"  report="mixer -> channel_list"/>
+				<policy label="mixer -> channel_list"         report="mixer_gui_qt -> channel_list"/>
 			</rom>
 		</config>
 	</start>
diff --git a/repos/gems/run/wm.run b/repos/gems/run/wm.run
index 74f8a811e5..2fa20865dd 100644
--- a/repos/gems/run/wm.run
+++ b/repos/gems/run/wm.run
@@ -125,13 +125,14 @@ append config {
 		</provides>
 		<config>
 			<rom>
-				<policy label="layouter -> window_list"     report="wm -> window_list"/>
-				<policy label="layouter -> focus_request"   report="wm -> focus_request"/>
-				<policy label="decorator -> window_layout"  report="layouter -> window_layout"/>
-				<policy label="wm -> resize_request"        report="layouter -> resize_request"/>
-				<policy label="decorator -> pointer"        report="wm -> pointer"/>
-				<policy label="layouter -> hover"           report="decorator -> hover"/>
-				<policy label="wm -> focus"                 report="layouter -> focus"/>
+				<policy label="layouter -> window_list"       report="wm -> window_list"/>
+				<policy label="layouter -> focus_request"     report="wm -> focus_request"/>
+				<policy label="decorator -> window_layout"    report="layouter -> window_layout"/>
+				<policy label="wm -> resize_request"          report="layouter -> resize_request"/>
+				<policy label="decorator -> pointer"          report="wm -> pointer"/>
+				<policy label="layouter -> hover"             report="decorator -> hover"/>
+				<policy label="layouter -> decorator_margins" report="decorator -> decorator_margins"/>
+				<policy label="wm -> focus"                   report="layouter -> focus"/>
 			</rom>
 		</config>
 	</start>
diff --git a/repos/gems/src/app/floating_window_layouter/main.cc b/repos/gems/src/app/floating_window_layouter/main.cc
index df9a48bd1a..b6f0d36c32 100644
--- a/repos/gems/src/app/floating_window_layouter/main.cc
+++ b/repos/gems/src/app/floating_window_layouter/main.cc
@@ -224,6 +224,23 @@ struct Floating_window_layouter::Main : Operations
 	Attached_rom_dataspace hover { "hover" };
 
 
+	/**
+	 * Respond to decorator-margins information reported by the decorator
+	 */
+	Attached_rom_dataspace decorator_margins { "decorator_margins" };
+
+	void handle_decorator_margins_update(unsigned)
+	{
+		decorator_margins.update();
+
+		/* respond to change by adapting the maximized window geometry */
+		handle_mode_change(0);
+	}
+
+	Signal_dispatcher<Main> decorator_margins_dispatcher = {
+		sig_rec, *this, &Main::handle_decorator_margins_update };
+
+
 	/**
 	 * Install handler for responding to user input
 	 */
@@ -245,14 +262,23 @@ struct Floating_window_layouter::Main : Operations
 	{
 		/* determine maximized window geometry */
 		Framebuffer::Mode const mode = nitpicker.mode();
-		
-		/*
-		 * XXX obtain decorator constraints dynamically
-		 */
-		enum { PAD_LEFT = 4, PAD_RIGHT = 4, PAD_TOP = 20, PAD_BOTTOM = 4 };
-		maximized_window_geometry = Rect(Point(PAD_LEFT, PAD_TOP),
-		                                 Area(mode.width() - PAD_LEFT - PAD_RIGHT,
-		                                      mode.height() - PAD_TOP - PAD_BOTTOM));
+
+		/* read decorator margins from the decorator's report */
+		unsigned top = 0, bottom = 0, left = 0, right = 0;
+		try {
+			Xml_node const margins_xml(decorator_margins.local_addr<char>());
+			Xml_node const floating_xml = margins_xml.sub_node("floating");
+
+			top    = attribute(floating_xml, "top",    0UL);
+			bottom = attribute(floating_xml, "bottom", 0UL);
+			left   = attribute(floating_xml, "left",   0UL);
+			right  = attribute(floating_xml, "right",  0UL);
+
+		} catch (...) { };
+
+		maximized_window_geometry = Rect(Point(left, top),
+		                                 Area(mode.width() - left - right,
+		                                      mode.height() - top - bottom));
 	}
 	
 	Signal_dispatcher<Main> mode_change_dispatcher = {
@@ -289,7 +315,9 @@ struct Floating_window_layouter::Main : Operations
 
 		window_list.sigh(window_list_dispatcher);
 		focus_request.sigh(focus_request_dispatcher);
+
 		hover.sigh(hover_dispatcher);
+		decorator_margins.sigh(decorator_margins_dispatcher);
 		input.sigh(input_dispatcher);
 
 		window_layout_reporter.enabled(true);
diff --git a/repos/libports/run/qt5_common.inc b/repos/libports/run/qt5_common.inc
index 5916fd55ae..55e2760a0e 100644
--- a/repos/libports/run/qt5_common.inc
+++ b/repos/libports/run/qt5_common.inc
@@ -97,14 +97,15 @@ proc qt5_start_nodes { feature_arg } {
 			</provides>
 			<config>
 				<rom>
-					<policy label="layouter -> window_list"     report="wm -> window_list"/>
-					<policy label="layouter -> focus_request"   report="wm -> focus_request"/>
-					<policy label="decorator -> window_layout"  report="layouter -> window_layout"/>
-					<policy label="wm -> resize_request"        report="layouter -> resize_request"/>
-					<policy label="decorator -> pointer"        report="wm -> pointer"/>
-					<policy label="layouter -> hover"           report="decorator -> hover"/>
-					<policy label="wm -> focus"                 report="layouter -> focus"/>
-					<policy label="clipboard -> focus"          report="nitpicker -> focus"/>
+					<policy label="layouter -> window_list"       report="wm -> window_list"/>
+					<policy label="layouter -> focus_request"     report="wm -> focus_request"/>
+					<policy label="decorator -> window_layout"    report="layouter -> window_layout"/>
+					<policy label="wm -> resize_request"          report="layouter -> resize_request"/>
+					<policy label="decorator -> pointer"          report="wm -> pointer"/>
+					<policy label="layouter -> hover"             report="decorator -> hover"/>
+					<policy label="wm -> focus"                   report="layouter -> focus"/>
+					<policy label="clipboard -> focus"            report="nitpicker -> focus"/>
+					<policy label="layouter -> decorator_margins" report="decorator -> decorator_margins"/>
 				</rom>
 			</config>
 		</start>