--- a/source/blender/compositor/operations/COM_ViewerOperation.cc
+++ b/source/blender/compositor/operations/COM_ViewerOperation.cc
@@ -9,7 +9,8 @@
 
 #include "IMB_imbuf.hh"
 #include "IMB_imbuf_types.hh"
+#include "IMB_colormanagement.hh"
 
 namespace blender::compositor {