diff --git a/coin/platform_configs/cmake_platforms_wasm.yaml b/coin/platform_configs/cmake_platforms_wasm.yaml
index 87ef3f63..39d8f60b 100644
--- a/coin/platform_configs/cmake_platforms_wasm.yaml
+++ b/coin/platform_configs/cmake_platforms_wasm.yaml
@@ -25,7 +25,7 @@ Configurations:
         'EM_CONFIG={{.Env.EMSDK}}/.emscripten',
         'TARGET_CONFIGURE_ARGS=-release -platform wasm-emscripten -nomake examples',
         'TARGET_CMAKE_ARGS=-DQT_GENERATE_WRAPPER_SCRIPTS_FOR_ALL_HOSTS=ON',
-        'NON_QTBASE_TARGET_CMAKE_ARGS=-DFEATURE_pkg_config=OFF -DQT_ADDITIONAL_HOST_PACKAGES_PREFIX_PATH={{.Env.Protobuf_ROOT_mingw}} -DFEATURE_native_grpc=OFF',
+        'NON_QTBASE_TARGET_CMAKE_ARGS=-DFEATURE_pkg_config=OFF -DQT_ADDITIONAL_HOST_PACKAGES_PREFIX_PATH={{.Env.Protobuf_ROOT_mingw}} -DFEATURE_native_grpc=OFF -DQT_PROTOBUF_WELL_KNOWN_TYPES_PROTO_DIR={{.Env.Protobuf_ROOT_mingw}}/include',
     ]
 -
     Id: 'webassembly-macos-thread'
@@ -38,6 +38,6 @@ Configurations:
     Environment variables: [
         'EM_CONFIG={{.Env.EMSDK}}/.emscripten',
         'TARGET_CONFIGURE_ARGS=-release -platform wasm-emscripten -nomake examples -feature-thread',
-        'NON_QTBASE_TARGET_CMAKE_ARGS=-DQT_ADDITIONAL_HOST_PACKAGES_PREFIX_PATH=/usr/local -DFEATURE_native_grpc=OFF',
+        'NON_QTBASE_TARGET_CMAKE_ARGS=-DQT_ADDITIONAL_HOST_PACKAGES_PREFIX_PATH=/usr/local -DFEATURE_native_grpc=OFF -DQT_PROTOBUF_WELL_KNOWN_TYPES_PROTO_DIR=/usr/local/include',
         'TARGET_CMAKE_ARGS=-DQT_GENERATE_WRAPPER_SCRIPTS_FOR_ALL_HOSTS=ON'
     ]