diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f6b06bf1..5a228e342 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -337,7 +337,7 @@ IF (BUILD_CLAR)
 
 	ADD_CUSTOM_COMMAND(
 		OUTPUT ${CLAR_PATH}/clar.suite
-		COMMAND ${PYTHON_EXECUTABLE} generate.py -xonline .
+		COMMAND ${PYTHON_EXECUTABLE} generate.py -f -xonline .
 		DEPENDS ${SRC_TEST}
 		WORKING_DIRECTORY ${CLAR_PATH}
 	)