diff --git a/src/core/ngx_array.h b/src/core/ngx_array.h
index 9cef9f3..f54517f 100644
--- a/src/core/ngx_array.h
+++ b/src/core/ngx_array.h
@@ -7,15 +7,15 @@
 
 
 struct ngx_array_s {
-    void       *elts;
-    int         nelts;
-    size_t      size;
-    int         nalloc;
-    ngx_pool_t *pool;
+    void        *elts;
+    ngx_uint_t   nelts;
+    size_t       size;
+    ngx_uint_t   nalloc;
+    ngx_pool_t  *pool;
 };
 
 
-ngx_array_t *ngx_create_array(ngx_pool_t *p, int n, size_t size);
+ngx_array_t *ngx_create_array(ngx_pool_t *p, ngx_uint_t n, size_t size);
 void ngx_destroy_array(ngx_array_t *a);
 void *ngx_push_array(ngx_array_t *a);