diff --git a/rules.mak b/rules.mak
index d1ff311..44421af 100644
--- a/rules.mak
+++ b/rules.mak
@@ -105,7 +105,11 @@ modules:
 	$(call LINK,$(filter %.o %.a %.mo, $^))
 
 %.a:
+ifeq ($(shell uname),Darwin)
+	$(call quiet-command,rm -f $@ && libtool -static -o $@ $^,"  libtool    $(TARGET_DIR)$@")
+else
 	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
+endif
 
 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))