diff --git a/build_windows.sh b/build_windows.sh
index 4e7131c6..625a4b22 100755
--- a/build_windows.sh
+++ b/build_windows.sh
@@ -47,7 +47,7 @@ make VERBOSE=1
 # Finally, build freedv-gui
 cd $FREEDVGUIDIR && git pull
 mkdir -p $BUILD_DIR && cd $BUILD_DIR && rm -Rf *
-$CMAKE -DCMAKE_BUILD_TYPE=Debug -DCODEC2_BUILD_DIR=$CODEC2DIR/$BUILD_DIR -DLPCNET_BUILD_DIR=$LPCNETDIR/$BUILD_DIR ..
+$CMAKE -DCMAKE_BUILD_TYPE=Debug -DCODEC2_BUILD_DIR=$CODEC2DIR/$BUILD_DIR -DLPCNET_BUILD_DIR=$LPCNETDIR/$BUILD_DIR -DBOOTSTRAP_WXWIDGETS=1 ..
 make VERBOSE=1