--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -1009,14 +1009,14 @@ ngx_http_gzip_filter_alloc(void *opaque,
         ctx->allocated -= alloc;
 
         ngx_log_debug4(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0,
-                       "gzip alloc: n:%ud s:%ud a:%ud p:%p",
+                       "gzip alloc: n:%ud s:%ud a:%ui p:%p",
                        items, size, alloc, p);
 
         return p;
     }
 
     ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0,
-                  "gzip filter failed to use preallocated memory: %ud of %ud",
+                  "gzip filter failed to use preallocated memory: %ud of %ui",
                   items * size, ctx->allocated);
 
     p = ngx_palloc(ctx->request->pool, items * size);