diff --git a/rtl/embedded/Makefile b/rtl/embedded/Makefile
index 27720edc32..2f6262085d 100644
--- a/rtl/embedded/Makefile
+++ b/rtl/embedded/Makefile
@@ -374,7 +374,7 @@ ifeq ($(SUBARCH),armv7a)
 CPU_UNITS=allwinner_a20
 endif
 ifeq ($(CPU_UNITS),)
-$(error Invalid value set for SUBARCH)
+$(warning No CPUs enabled for given SUBARCH)
 endif
 endif
 ifeq ($(ARCH),avr)
diff --git a/rtl/embedded/Makefile.fpc b/rtl/embedded/Makefile.fpc
index 28da8d110c..6d435694da 100644
--- a/rtl/embedded/Makefile.fpc
+++ b/rtl/embedded/Makefile.fpc
@@ -82,7 +82,7 @@ ifeq ($(SUBARCH),armv7a)
 CPU_UNITS=allwinner_a20
 endif
 ifeq ($(CPU_UNITS),)
-$(error Invalid value set for SUBARCH)
+$(warning No CPUs enabled for given SUBARCH)
 endif
 endif