1 files changed, 1 insertions, 0 deletions
diff --git a/src/lib/image.h b/src/lib/image.h
index a5823656c..7edea2186 100644
--- a/src/lib/image.h
+++ b/src/lib/image.h
@@ -99,6 +99,7 @@ public:
 
 private:
 	friend struct pixel_formats_test;
+	friend struct make_part_black_test;
 
 	void allocate ();
 	void swap (Image &);