diff --git a/src/core/ngx_open_file_cache.c b/src/core/ngx_open_file_cache.c
index c44ac96..b72af5e 100644
--- a/src/core/ngx_open_file_cache.c
+++ b/src/core/ngx_open_file_cache.c
@@ -124,7 +124,7 @@
 
     if (cache->current) {
         ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
-                      "%d items still leave in open file cache",
+                      "%ui items still leave in open file cache",
                       cache->current);
     }