diff --git a/Makefile.modules b/Makefile.modules
index 2f2aa158a9..56291b9e38 100644
--- a/Makefile.modules
+++ b/Makefile.modules
@@ -33,3 +33,5 @@ CFLAGS += $(EXTDEFINES)
 include $(RIOTBASE)/Makefile.dep
 
 export USEMODULE
+
+export INCLUDES += -I$(RIOTBASE)/core/include