diff --git a/Makefile b/Makefile
index 5506bce..5a0aee4 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,8 @@ PRIVKEY = tools/testkey.pk8
 PUBKEY = tools/testkey.x509.pem
 
 ZIPS_DIRS = $(wildcard dist-*)
-FILES_COMMON = $(shell find META-INF -type f)
+FILES_COMMON_ZIP = $(shell find META-INF -type f)
+FILES_COMMON = $(FILES_COMMON_ZIP) $(wildcard common/*)
 
 .SECONDEXPANSION:
 .PHONY: $(ZIPS_DIRS:dist-%=clean-%)
@@ -23,7 +24,7 @@ $(ZIPS_DIRS:dist-%=cm-custom-%-signed.zip): cm-custom-%-signed.zip : cm-custom-%
 
 # build target
 $(ZIPS_DIRS:dist-%=cm-custom-%.zip): cm-custom-%.zip : $(FILES_COMMON) $$(shell find dist-$$* -type f)
-	zip $@ $(FILES_COMMON)
+	zip $@ $(FILES_COMMON_ZIP)
 	rm -rf build-$*
 	cp -a dist-$* build-$*
 	cd build-$* && \