diff --git a/src/couchdb/priv/couch_js/http.c b/src/couchdb/priv/couch_js/http.c
index 7630c456..052865aa 100644
--- a/src/couchdb/priv/couch_js/http.c
+++ b/src/couchdb/priv/couch_js/http.c
@@ -164,7 +164,7 @@ http_open(JSContext* cx, JSObject* req, jsval mth, jsval url, jsval snc)
         goto done;
     }
     
-    if(JSVAL_IS_BOOLEAN(snc) && !JSVAL_TO_BOOLEAN(snc)) {
+    if(JSVAL_IS_BOOLEAN(snc) && JSVAL_TO_BOOLEAN(snc)) {
         JS_ReportError(cx, "Synchronous flag must be false.");
         goto done;
     }