diff --git a/.ci/script.sh b/.ci/script.sh
index c92cb40bd43b5062a6add2b0833e319a10692e67..f3150ea00474703546acbf12cc9a4d83da393c0e 100755
--- a/.ci/script.sh
+++ b/.ci/script.sh
@@ -31,7 +31,7 @@ if [ $TRAVIS_OS_NAME == osx ]; then
     # Build dependencies.
     cmake -Hdeps -B.deps -DCMAKE_BUILD_TYPE=Release \
         -DUSE_BUNDLED_BOOST=OFF \
-        -DUSE_BUNDLED_GTEST=OFF
+        -DUSE_BUNDLED_GTEST=OFF \
         -DUSE_BUNDLED_JSON=OFF
     cmake --build .deps