diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index 3210c21a90..50f67c68fe 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -102,7 +102,7 @@ PROXY_DECLARE(apr_status_t) ap_proxy_strncpy(char *dst, const char *src,
     thelen = thenil - dst;
     /* Assume the typical case is smaller copying into bigger
        so we have a fast return */
-    if ((thelen < dlen-1) || ((strlen(src)) == thelen)) {
+    if ((thelen < dlen-1) || (src[thelen] == '\0') {
         return APR_SUCCESS;
     }
     /* XXX: APR_ENOSPACE would be better */