diff --git a/tests/unit_tests.cc b/tests/unit_tests.cc
index dc7e786dd..61a4458e0 100644
--- a/tests/unit_tests.cc
+++ b/tests/unit_tests.cc
@@ -14,6 +14,7 @@
  *   See the License for the specific language governing permissions and
  *   limitations under the License.
  */
+#include "config.h"
 #include <gtest/gtest.h>
 #ifdef HAVE_COUCHBASEMOCK
 #include "mock-environment.h"