diff --git a/decode.go b/decode.go
index 06c5f1a..aa42313 100644
--- a/decode.go
+++ b/decode.go
@@ -86,7 +86,7 @@ var decode = &cli.Command{
 				continue
 			}
 
-			ctx = lineProcessingError(ctx, "couldn't decode input '%s'", input)
+			ctx = lineProcessingError(ctx, "couldn't decode input '%s': %s", input, err)
 		}
 
 		exitIfLineProcessingError(ctx)