diff --git a/build.ps1 b/build.ps1
index 399c55d0..bc9d8925 100644
--- a/build.ps1
+++ b/build.ps1
@@ -7,7 +7,7 @@ $WEB_FRONT="$WORK_DIR/libcs/web/front"
 
 $env:CC="clang"
 $env:CXX="clang++"
-$env:CXXFLAGS="-I$WEBRTC_DIR/src -I$WEBRTC_DIR/src/third_party/abseil-cpp -I$MSQUIC_DIR/src/inc -std=c++17 -DWEBRTC_WIN -DQUIC_API_ENABLE_PREVIEW_FEATURES -DNOMINMAX"
+$env:CGO_CXXFLAGS="-I$WEBRTC_DIR/src -I$WEBRTC_DIR/src/third_party/abseil-cpp -I$MSQUIC_DIR/src/inc -std=c++17 -DWEBRTC_WIN -DQUIC_API_ENABLE_PREVIEW_FEATURES -DNOMINMAX"
 $env:CGO_LDFLAGS="-L$MSQUIC_DIR/build/windows/x64_schannel/obj/Release -L$WEBRTC_DIR/src/out/release/obj -lmsquic.lib -lwebrtc.lib"
 $env:CARGO_CFG_TARGET_OS="windows"
 $env:RUSTFLAGS="-L $MSQUIC_OUT_DIR -l msquic -L $WEBRTC_OUT_DIR -l webrtc"