diff --git a/Makefile.dbg b/Makefile.dbg
new file mode 100644
index 00000000..eb30d0a3
--- /dev/null
+++ b/Makefile.dbg
@@ -0,0 +1,3 @@
+#CFLAGS+=-Wunreachable-code
+#CFLAGS+=-O0
+#CFLAGS+=-DUSE_ABSTRACT_NAMESPACE
diff --git a/Makefile.in b/Makefile.in
index 3b688425..320d53b4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -93,9 +93,7 @@ LDFLAGS=@LDFLAGS@ @PORTAUDIO_LIBS@ @SRC_LIBS@ @SPANDSP_LIBS@ @CODEC2_LIBS@ @PTHR
 
 CFLAGS=	@CPPFLAGS@ @CFLAGS@ @PORTAUDIO_CFLAGS@ @SRC_CFLAGS@ @SPANDSP_CFLAGS@ @PTHREAD_CFLAGS@ $(VOIPTEST_CFLAGS) 
 CFLAGS+=-Wall -Wno-unused-value
-#CFLAGS+=-Wunreachable-code
-#CFLAGS+=-O0
-CFLAGS+=-DDO_TIMING_CHECKS
+-include Makefile.dbg
 
 DEFS=	@DEFS@