diff --git a/cpu/lm4f120/Makefile.include b/cpu/lm4f120/Makefile.include
index e038dd686d..17d7b63192 100644
--- a/cpu/lm4f120/Makefile.include
+++ b/cpu/lm4f120/Makefile.include
@@ -1,4 +1,4 @@
 export CPU_ARCH = cortex-m4f
 
 include $(RIOTMAKE)/arch/cortexm.inc.mk
-include $(RIOTCPU)/stellaris_common/Makefile
+include $(RIOTCPU)/stellaris_common/Makefile.include
diff --git a/cpu/stellaris_common/Makefile b/cpu/stellaris_common/Makefile.include
similarity index 100%
rename from cpu/stellaris_common/Makefile
rename to cpu/stellaris_common/Makefile.include