diff --git a/keyboards/ergodox/keymaps/zweihander-osx/makefile.mk b/keyboards/ergodox/keymaps/zweihander-osx/Makefile
similarity index 100%
rename from keyboards/ergodox/keymaps/zweihander-osx/makefile.mk
rename to keyboards/ergodox/keymaps/zweihander-osx/Makefile