diff --git a/bmc/test/image_mock.hpp b/bmc/test/image_mock.hpp
index 9999f58..8d84dbe 100644
--- a/bmc/test/image_mock.hpp
+++ b/bmc/test/image_mock.hpp
@@ -23,9 +23,6 @@
     MOCK_METHOD(int, getSize, (), (override));
 };
 
-std::unique_ptr<ImageHandlerMock> CreateImageMock()
-{
-    return std::make_unique<ImageHandlerMock>();
-}
+std::unique_ptr<ImageHandlerMock> CreateImageMock();
 
 } // namespace ipmi_flash