diff --git a/.cirrus.yml b/.cirrus.yml
index 83158ca..315d834 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -40,7 +40,7 @@ pi_task:
     - cd raylib-c
     - mkdir build2
     - cd build2
-    - cmake -DPLATFORM=${RAYLIB_PLATFORM} -DOPENGL_VERSION=${RAYLIB_OPENGL} -DBUILD_EXAMPLES=OFF -DCUSTOMIZE_BUILD=ON -DSUPPORT_FILEFORMAT_JPG=ON -DSUPPORT_FILEFORMAT_FLAC=ON -DWITH_PIC=ON -DCMAKE_BUILD_TYPE=Release ..
+    - cmake -DPLATFORM=${RAYLIB_PLATFORM} -DOPENGL_VERSION="${RAYLIB_OPENGL}" -DBUILD_EXAMPLES=OFF -DCUSTOMIZE_BUILD=ON -DSUPPORT_FILEFORMAT_JPG=ON -DSUPPORT_FILEFORMAT_FLAC=ON -DWITH_PIC=ON -DCMAKE_BUILD_TYPE=Release ..
     - make -j2
     - cp raylib/libraylib.a /usr/local/lib/libraylib.a
   build_script: