diff --git a/src/plugins/platforms/wasm/qwasmeventtranslator.cpp b/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
index d165ee5839..a34b957537 100644
--- a/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
+++ b/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
@@ -824,7 +824,7 @@ static Qt::Key find_impl(const KeyMapping *first, const KeyMapping *last, Qt::Ke
             return first->to;
         ++first;
     }
-    return {};
+    return Qt::Key_unknown;
 }
 
 template <size_t N>