diff --git a/Makefile b/Makefile
index 33e35738bb..04fbb02612 100644
--- a/Makefile
+++ b/Makefile
@@ -176,7 +176,7 @@ includemakefiles= \
 	$(foreach class,$(classes), \
 		$(eval $(class)-srcs+= \
 			$$(subst $(top)/,, \
-			$$(abspath $$(addprefix $(dir $(1)),$$($(class)-y)))))) \
+			$$(abspath $$(subst $(dir $(1))/,/,$$(addprefix $(dir $(1)),$$($(class)-y))))))) \
 	$(foreach special,$(special-classes), \
 		$(foreach item,$($(special)-y), $(call $(special)-handler,$(dir $(1)),$(item)))) \
 	$(eval subdirs+=$$(subst $(CURDIR)/,,$$(abspath $$(addprefix $(dir $(1)),$$(subdirs-y)))))