diff --git a/src/protocol/uri.c b/src/protocol/uri.c
index 7538ca92e..45d0e39c3 100644
--- a/src/protocol/uri.c
+++ b/src/protocol/uri.c
@@ -153,15 +153,7 @@ check_uri_file(unsigned char *name)
 	int i;
 	int namelen = strlen(name);
 
-	for (i = 0; i < sizeof(chars) - 1; i++) {
-		unsigned char *pos = memchr(name, chars[i], namelen);
-	
-		if (!pos) continue;
-
-		return pos - name;
-	}
-
-	return namelen;
+	return strcspn(name, chars);
 }
 
 /* Encodes URIs without encoding stuff like fragments and query separators. */