diff --git a/.travis.yml b/.travis.yml
index 07926e0..42a9a1f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,7 +34,7 @@ script:
       -DCOVERALLS=${COVERAGE}
       -DCMAKE_BUILD_TYPE=${CONFIGURATION}
       -DCMAKE_INSTALL_PREFIX=criterion-${TRAVIS_TAG}
-      -DLANGUAGES=CXX
+      -DLANG_OBJC=ON
       ..
   - TERM=dumb cmake --build . --target criterion_tests -- -j4
   - ctest -j4
diff --git a/appveyor.yml b/appveyor.yml
index 4b1cc8d..6b91c6b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,6 +15,7 @@ environment:
   matrix:
   - COMPILER: mingw
     GENERATOR: "MSYS Makefiles"
+    CMAKE_OPTS: -DLANG_OBJC=ON
   - COMPILER: msvc
     GENERATOR: "Visual Studio 14 2015"
     CFLAGS: /MP
@@ -43,7 +44,7 @@ install:
       -DCTESTS=ON
       -DCMAKE_INSTALL_PREFIX="criterion-%RELEASE_NAME%"
       -DCMAKE_BUILD_TYPE="%CONFIGURATION%"
-      -DLANGUAGES=CXX
+      %CMAKE_OPTS%
       -G "%GENERATOR%"
       ..