diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 2cfce7a92dc..2b5cb8671cc 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -23,7 +23,11 @@ define Package/Default
   else
     VERSION:=$(PKG_RELEASE)
   endif
-  PKGARCH:=$(BOARD)
+  ifneq ($(CONFIG_TARGET_adm5120),y)
+    PKGARCH:=$(BOARD)
+  else
+    PKGARCH:=$(BOARD)_$(ARCH)
+  endif
   PRIORITY:=optional
   DEFAULT:=
   MENU:=
diff --git a/package/opkg/Makefile b/package/opkg/Makefile
index 9f5faa34747..864a13b4789 100644
--- a/package/opkg/Makefile
+++ b/package/opkg/Makefile
@@ -59,7 +59,7 @@ define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		CC="$(TARGET_CC)" \
 		DESTDIR="$(PKG_INSTALL_DIR)" \
-		HOST_CPU="$(BOARD)" \
+		HOST_CPU="$(PKGARCH)" \
 		all install
 endef
 
@@ -68,7 +68,7 @@ define Package/opkg/install
 	$(INSTALL_DIR) $(1)/bin
 	$(INSTALL_DIR) $(1)/etc
 	$(INSTALL_DATA) ./files/opkg.conf $(1)/etc/
-	$(SED) 's,$$$$S,$(BOARD),g' -e 's,$$$$A,$(ARCH),g' $(1)/etc/opkg.conf
+	$(SED) 's,$$$$S,$(PKGARCH),g' $(1)/etc/opkg.conf
 	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/opkg-cl $(1)/bin/opkg
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libopkg.so.* $(1)/usr/lib/