diff --git a/src/nxt_brotli.c b/src/nxt_brotli.c
index 773b8b6f2..c69d977e0 100644
--- a/src/nxt_brotli.c
+++ b/src/nxt_brotli.c
@@ -46,14 +46,14 @@ nxt_brotli_compress(nxt_http_comp_compressor_ctx_t *ctx, const uint8_t *in_buf,
                                      &in_len, &in_buf, &out_bytes, &out_buf,
                                      NULL);
     if (!ok) {
-        return -1;
+        goto out_err_free;
     }
 
     ok = BrotliEncoderCompressStream(brotli, BROTLI_OPERATION_FLUSH,
                                      &in_len, &in_buf, &out_bytes, &out_buf,
                                      NULL);
     if (!ok) {
-        return -1;
+        goto out_err_free;
     }
 
     if (last) {
@@ -61,13 +61,18 @@ nxt_brotli_compress(nxt_http_comp_compressor_ctx_t *ctx, const uint8_t *in_buf,
                                          &in_len, &in_buf, &out_bytes,
                                          &out_buf, NULL);
         if (!ok) {
-            return -1;
+            goto out_err_free;
         }
 
         BrotliEncoderDestroyInstance(brotli);
     }
 
     return out_len - out_bytes;
+
+out_err_free:
+    BrotliEncoderDestroyInstance(brotli);
+
+    return -1;
 }
 
 
diff --git a/src/nxt_http_compression.c b/src/nxt_http_compression.c
index f9a94d055..079eceef2 100644
--- a/src/nxt_http_compression.c
+++ b/src/nxt_http_compression.c
@@ -195,7 +195,6 @@ nxt_http_comp_compress_app_response(nxt_task_t *task, nxt_http_request_t *r,
     }
 
     buf->data = (*b)->data;
-    buf->parent = (*b)->parent;
 
     last = ctx->clen_sent + in_len == ctx->resp_clen;