diff --git a/src/core/ngx_hash.c b/src/core/ngx_hash.c
index d684e7057..d9c157c1d 100644
--- a/src/core/ngx_hash.c
+++ b/src/core/ngx_hash.c
@@ -358,6 +358,7 @@ found:
                           "could not build %s, you should "
                           "increase %s_max_size: %i",
                           hinit->name, hinit->name, hinit->max_size);
+            ngx_free(test);
             return NGX_ERROR;
         }