diff --git a/.github/scripts/Windows/prepare_msys.sh b/.github/scripts/Windows/prepare_msys.sh
index 8076d3270..4fd6c7287 100644
--- a/.github/scripts/Windows/prepare_msys.sh
+++ b/.github/scripts/Windows/prepare_msys.sh
@@ -19,7 +19,7 @@ if test -d /c/Program\ Files/NDI; then
         NDI_D=$(ls -d /c/Program\ Files/NDI/*SDK)
         export CPATH=$CPATH:$NDI_D/Include
         export LIBRARY_PATH=$LIBRARY_PATH:$NDI_D/Lib/x64
-        cat $NDI_D/Version.txt | sed 's/\(.*\)/\#define NDI_VERSION \"\1\"/' | tee /usr/local/include/ndi_version.h
+        cat "$NDI_D/Version.txt" | sed 's/\(.*\)/\#define NDI_VERSION \"\1\"/' | tee /usr/local/include/ndi_version.h
 fi
 
 JACK_D=/c/Program\ Files/JACK2