diff --git a/.github/scripts/macOS/prepare.sh b/.github/scripts/macOS/prepare.sh
index 863a33b3f..16a525b19 100755
--- a/.github/scripts/macOS/prepare.sh
+++ b/.github/scripts/macOS/prepare.sh
@@ -65,6 +65,8 @@ install_ndi() {
                 NDI_LIB=/Library/NDI/lib/x64
         else # NDI 5
                 NDI_LIB=/Library/NDI/lib/macOS
+                # TODO: remove - workaround for not using struct keyword causing C code fail
+                sudo sed -i -e 's/typedef \([^ ]*_instance_type\)/typedef struct \1/' /Library/NDI/include/*
         fi
         export CPATH=${CPATH:+"$CPATH:"}/Library/NDI/include
         export DYLIBBUNDLER_FLAGS="${DYLIBBUNDLER_FLAGS:+$DYLIBBUNDLER_FLAGS }-s $NDI_LIB"