diff --git a/lib/curl_fnmatch.c b/lib/curl_fnmatch.c
index ffac8048f6..58e3f776b9 100644
--- a/lib/curl_fnmatch.c
+++ b/lib/curl_fnmatch.c
@@ -319,7 +319,7 @@ static int loop(const unsigned char *pattern, const unsigned char *string,
         else if(charset[CURLFNM_PRINT])
           found = ISPRINT(*s);
         else if(charset[CURLFNM_SPACE])
-          found = ISSPACE(*s);
+          found = ISBLANK(*s);
         else if(charset[CURLFNM_UPPER])
           found = ISUPPER(*s);
         else if(charset[CURLFNM_LOWER])