diff --git a/renderdoc/replay/replay_controller.cpp b/renderdoc/replay/replay_controller.cpp
index 4bf11e6b5..847176184 100644
--- a/renderdoc/replay/replay_controller.cpp
+++ b/renderdoc/replay/replay_controller.cpp
@@ -155,7 +155,7 @@ float ConvertComponent(const ResourceFormat &fmt, byte *data)
     }
   }
 
-  RDCERR("Unexpected format to convert from");
+  RDCERR("Unexpected format to convert from %u %u", fmt.compByteWidth, fmt.compType);
 
   return 0.0f;
 }