diff --git a/apps/rehash.c b/apps/rehash.c
index 56a6ccea09..26bdb64ae4 100644
--- a/apps/rehash.c
+++ b/apps/rehash.c
@@ -266,7 +266,7 @@ static int do_file(const char *filename, const char *fullpath, enum Hash h)
 
     if (sk_X509_INFO_num(inf) != 1) {
         BIO_printf(bio_err,
-                   "%s: warning: skipping %s,"
+                   "%s: warning: skipping %s, "
                    "it does not contain exactly one certificate or CRL\n",
                    opt_getprog(), filename);
         /* This is not an error. */