diff --git a/tools/c_rehash.in b/tools/c_rehash.in
index 343cdc1e75..4dd1b44682 100644
--- a/tools/c_rehash.in
+++ b/tools/c_rehash.in
@@ -143,7 +143,7 @@ sub hash_dir {
             }
         }
     }
-    FILE: foreach $fname (grep {/\.(pem)|(crt)|(cer)|(crl)$/} @flist) {
+    FILE: foreach $fname (grep {/\.(pem|crt|cer|crl)$/} @flist) {
         # Check to see if certificates and/or CRLs present.
         my ($cert, $crl) = check_file($fname);
         if (!$cert && !$crl) {