1 files changed, 3 insertions, 1 deletions
diff --git a/ext/flash/01_http.js b/ext/flash/01_http.js
index 34b158e40..5152fd9e5 100644
--- a/ext/flash/01_http.js
+++ b/ext/flash/01_http.js
@@ -316,11 +316,13 @@ async function handleResponse(
       respBody,
       length,
     );
+    // A HEAD request always ignores body, but includes the correct content-length size.
+    const responseLen = method === 1 ? core.byteLength(responseStr) : length;
     writeFixedResponse(
       serverId,
       i,
       responseStr,
-      length,
+      responseLen,
       !ws, // Don't close socket if there is a deferred websocket upgrade.
       respondFast,
     );