diff --git a/src/http/modules/ngx_http_gunzip_filter_module.c b/src/http/modules/ngx_http_gunzip_filter_module.c
index d4e41e4..c2d504e 100644
--- a/src/http/modules/ngx_http_gunzip_filter_module.c
+++ b/src/http/modules/ngx_http_gunzip_filter_module.c
@@ -199,7 +199,7 @@
         }
     }
 
-    if (ctx->nomem) {
+    if (ctx->nomem || in == NULL) {
 
         /* flush busy buffers */
 
diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
index 837b0bc..ea1f1d0 100644
--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -372,7 +372,7 @@
         r->connection->buffered |= NGX_HTTP_GZIP_BUFFERED;
     }
 
-    if (ctx->nomem) {
+    if (ctx->nomem || in == NULL) {
 
         /* flush busy buffers */