diff --git a/cmake/QtWasmHelpers.cmake b/cmake/QtWasmHelpers.cmake
index d154fb8d463..7f10da9b25e 100644
--- a/cmake/QtWasmHelpers.cmake
+++ b/cmake/QtWasmHelpers.cmake
@@ -82,7 +82,7 @@ function (qt_internal_setup_wasm_target_properties wasmTarget)
 
         target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ASYNCIFY" "-Os")
         target_compile_definitions("${wasmTarget}" INTERFACE QT_HAVE_EMSCRIPTEN_ASYNCIFY)
-    elseif ("QT_EMSCRIPTEN_ASYNCIFY=2" IN_LIST QT_QMAKE_DEVICE_OPTIONS)
+    elseif ("QT_EMSCRIPTEN_ASYNCIFY=2" IN_LIST QT_QMAKE_DEVICE_OPTIONS OR QT_FEATURE_wasm_jspi)
         # Enable JSPI (also known as asyncify 2). Unlike asyncify 1 this
         # is supported natively by the browsers, and does not require
         # enabling optimizations.
diff --git a/configure.cmake b/configure.cmake
index dd93c4a4f59..0e86ed743d7 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -984,6 +984,14 @@ qt_feature("wasm-exceptions" PUBLIC
 qt_feature_definition("wasm-exceptions" "QT_WASM_EXCEPTIONS" VALUE "1")
 qt_feature_config("wasm-exceptions" QMAKE_PRIVATE_CONFIG)
 
+qt_feature("wasm-jspi" PUBLIC
+    LABEL "WebAssembly JSPI"
+    PURPOSE "Enables WebAssembly JavaScript Promise Integration (JSPI)"
+    AUTODETECT OFF
+)
+qt_feature_definition("wasm-jspi" "QT_WASM_JSPI" VALUE "1")
+qt_feature_config("wasm-jspi" QMAKE_PRIVATE_CONFIG)
+
 qt_feature("localtime_r" PRIVATE
     LABEL "localtime_r()"
     CONDITION TEST_localtime_r
@@ -1314,6 +1322,10 @@ qt_configure_add_summary_entry(
     ARGS "wasm-exceptions"
     CONDITION ( TEST_architecture_arch STREQUAL wasm )
 )
+qt_configure_add_summary_entry(
+    ARGS "wasm-jspi"
+    CONDITION ( TEST_architecture_arch STREQUAL wasm )
+)
 qt_configure_add_summary_section(NAME "Target compiler supports")
 qt_configure_add_summary_entry(
     TYPE "featureList"