diff --git a/src/core/ngx_log.c b/src/core/ngx_log.c
index 6fb02db..8429d90 100644
--- a/src/core/ngx_log.c
+++ b/src/core/ngx_log.c
@@ -45,6 +45,7 @@
             len += ngx_snprintf(errstr + len, sizeof(errstr) - len - 1,
                             " [%s] (%d)",
                             err_levels[level], err);
+        else
             len += ngx_snprintf(errstr + len, sizeof(errstr) - len - 1,
                             " [%s] (%X)",
                             err_levels[level], err);