diff --git a/unit_test/CMakeLists.txt b/unit_test/CMakeLists.txt
index 76a797c3..c2ec8492 100644
--- a/unit_test/CMakeLists.txt
+++ b/unit_test/CMakeLists.txt
@@ -47,7 +47,7 @@ else()
 	if(MEM_BOUND_DEBUG)
 		target_compile_options(oel-test PRIVATE -fno-strict-aliasing)
 	endif()
-	target_compile_options(oel-test PRIVATE -Wall -Wextra -Wold-style-cast -Wshadow -Wconversion -Wno-sign-conversion)
+	target_compile_options(oel-test PRIVATE -Wall -Wextra -Wold-style-cast -Wshadow -Wconversion -Wsign-conversion)
 endif()
 
 target_link_libraries(oel-test gtest_main)