diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 667d61f9..6cbc304a 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -13,7 +13,7 @@ jobs:
     - run: |
         mkdir build
         cd build
-        cmake -DCMAKE_SYSTEM_NAME=WindowsStore -DCMAKE_SYSTEM_VERSION=10.0 -DCMAKE_CXX_COMPILER=cl.exe -DUSE_WS=1 -DUSE_TEST=1 ..
+        cmake -DCMAKE_SYSTEM_NAME=WindowsStore -DCMAKE_SYSTEM_VERSION="10.0" -DCMAKE_CXX_COMPILER=cl.exe -DUSE_WS=1 -DUSE_TEST=1 ..
     - run: cmake --build build
 
     # Running the unittest does not work, the binary cannot be found