diff --git a/cmake/QtWasmHelpers.cmake b/cmake/QtWasmHelpers.cmake
index 3ce1e3f126b..20bd5b333d6 100644
--- a/cmake/QtWasmHelpers.cmake
+++ b/cmake/QtWasmHelpers.cmake
@@ -34,6 +34,13 @@ function (qt_internal_setup_wasm_target_properties wasmTarget)
         target_link_options("${wasmTarget}" INTERFACE -fexceptions)
     endif()
 
+    # setjmp/longjmp type. The type is "emscripten" by default, but must
+    # be set to "wasm" when wasm-exceptions are used, for compatibility reasons.
+    if (QT_FEATURE_wasm_exceptions)
+        target_compile_options("${wasmTarget}" INTERFACE -s SUPPORT_LONGJMP=wasm)
+        target_link_options("${wasmTarget}" INTERFACE -s SUPPORT_LONGJMP=wasm)
+    endif()
+
     if (QT_FEATURE_thread)
         target_compile_options("${wasmTarget}" INTERFACE "SHELL:-pthread")
         target_link_options("${wasmTarget}" INTERFACE "SHELL:-pthread")