diff --git a/ext/f2c_blas/Makefile.in b/ext/f2c_blas/Makefile.in
index 106bd29a7..eb0f1f731 100755
--- a/ext/f2c_blas/Makefile.in
+++ b/ext/f2c_blas/Makefile.in
@@ -119,6 +119,8 @@ depends:
 .depends: $(DEPENDS)
 	cat *.d > .depends
 
+$(OBJS): Makefile
+
 ifeq ($(wildcard .depends), .depends)
 include .depends
 endif