diff --git a/external/harfbuzz/UnpackedTarball_harfbuzz.mk b/external/harfbuzz/UnpackedTarball_harfbuzz.mk
index aad08765852a..7df503752f08 100644
--- a/external/harfbuzz/UnpackedTarball_harfbuzz.mk
+++ b/external/harfbuzz/UnpackedTarball_harfbuzz.mk
@@ -24,6 +24,6 @@ $(eval $(call gb_UnpackedTarball_add_patches,harfbuzz, \
 # case to avoid incompatibilities with the system python version).
 # And while it does so unconditionally on windows, on other platforms that only
 # happens if the command to run doesn't have the executable bit set.
-$(eval $(call gb_UnpackedTarball_set_post_action,harfbuzz,chmod a-x src/gen*.py))
+$(eval $(call gb_UnpackedTarball_set_post_action,harfbuzz,chmod a-x src/*.py))
 
 # vim: set noet sw=4 ts=4: