diff --git a/Makefile b/Makefile
index cae600b..6fe9fe8 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,9 @@ endif
 
 
 all: mkdirs
+ifeq ($(USE_INTERNAL_ASSIMP), y)
 	$(MAKE) $(ASSIMP_LIB)
+endif
 	$(MAKE) $(LIBNAME)
 	$(MAKE) examples
 .PHONY: all