diff --git a/src/config.c b/src/config.c
index 1c666ddf..789c10fc 100644
--- a/src/config.c
+++ b/src/config.c
@@ -74,6 +74,7 @@ void loadServerConfig(char *filename) {
         } else if (!strcasecmp(argv[0],"unixsocket") && argc == 2) {
             server.unixsocket = zstrdup(argv[1]);
         } else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
+            errno = 0;
             server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
             if (errno || server.unixsocketperm > 0777) {
                 err = "Invalid socket file permissions"; goto loaderr;