diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 43a029318478..6fc29996ae29 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -193,9 +193,9 @@ ifeq ($(shell expr $(MAKE_VERSION) \>= 4.4), 1)
 $(let OUTPUT,$(OUTPUT)/,\
 	$(eval include ../../../build/Makefile.feature))
 else
-OUTPUT := $(OUTPUT)/
+override OUTPUT := $(OUTPUT)/
 $(eval include ../../../build/Makefile.feature)
-OUTPUT := $(patsubst %/,%,$(OUTPUT))
+override OUTPUT := $(patsubst %/,%,$(OUTPUT))
 endif
 endif