diff --git a/src/MyFirstUDRKit.cpp b/src/MyFirstUDRKit.cpp
index 7814155..7fb12d9 100644
--- a/src/MyFirstUDRKit.cpp
+++ b/src/MyFirstUDRKit.cpp
@@ -171,7 +171,7 @@ FB_UDR_END_FUNCTION
 FB_UDR_BEGIN_FUNCTION(MFK_Blob_Save)
 
 FB_UDR_MESSAGE(InMessage,
-							 (FB_VARCHAR, afilename)
+							 (FB_CHAR(8191), afilename)
 							 (FB_BLOB, ablobcallback)
 );