diff --git a/src/http/modules/ngx_http_image_filter_module.c b/src/http/modules/ngx_http_image_filter_module.c
index 823cf0ea3..1550aeecb 100644
--- a/src/http/modules/ngx_http_image_filter_module.c
+++ b/src/http/modules/ngx_http_image_filter_module.c
@@ -1169,10 +1169,22 @@ ngx_http_image_filter_create_conf(ngx_conf_t *cf)
         return NULL;
     }
 
+    /*
+     * set by ngx_pcalloc():
+     *
+     *     conf->width = 0;
+     *     conf->height = 0;
+     *     conf->angle = 0;
+     *     conf->wcv = NULL;
+     *     conf->hcv = NULL;
+     *     conf->acv = NULL;
+     *     conf->jqcv = NULL;
+     *     conf->shcv = NULL;
+     */
+
     conf->filter = NGX_CONF_UNSET_UINT;
     conf->jpeg_quality = NGX_CONF_UNSET_UINT;
     conf->sharpen = NGX_CONF_UNSET_UINT;
-    conf->angle = NGX_CONF_UNSET_UINT;
     conf->transparency = NGX_CONF_UNSET;
     conf->buffer_size = NGX_CONF_UNSET_SIZE;
 
@@ -1195,8 +1207,10 @@ ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
             conf->filter = prev->filter;
             conf->width = prev->width;
             conf->height = prev->height;
+            conf->angle = prev->angle;
             conf->wcv = prev->wcv;
             conf->hcv = prev->hcv;
+            conf->acv = prev->acv;
         }
     }
 
@@ -1218,14 +1232,6 @@ ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
         }
     }
 
-    if (conf->angle == NGX_CONF_UNSET_UINT) {
-        ngx_conf_merge_uint_value(conf->angle, prev->angle, 0);
-
-        if (conf->acv == NULL) {
-            conf->acv = prev->acv;
-        }
-    }
-
     ngx_conf_merge_value(conf->transparency, prev->transparency, 1);
 
     ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,