diff --git a/ext/f2c_libs/.cvsignore b/ext/f2c_libs/.cvsignore
index 8480a5eff..36d6bdc5f 100644
--- a/ext/f2c_libs/.cvsignore
+++ b/ext/f2c_libs/.cvsignore
@@ -2,3 +2,4 @@ Makefile
 arith.h
 signal1.h
 sysdep1.h
+makefile*