diff --git a/src/libavrdude.h b/src/libavrdude.h
index f6a96f8a..d22e38f6 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -86,6 +86,7 @@ enum msgmode {
   MSG2_INDENT1 = 16,    // Start by printing indentation of progname+1 blanks
   MSG2_INDENT2 = 32,    // Start by printing indentation of progname+2 blanks
   MSG2_FLUSH = 64,      // Flush before and after printing
+  MSG2_LEFT_MARGIN = 128, // Print \n unless last character printed was \n
 };
 
 /* formerly lists.h */
diff --git a/src/libavrdude.i b/src/libavrdude.i
index f07fa312..7eef7def 100644
--- a/src/libavrdude.i
+++ b/src/libavrdude.i
@@ -205,6 +205,7 @@ enum msgmode {
   MSG2_INDENT1 = 16,    // Start by printing indentation of progname+1 blanks
   MSG2_INDENT2 = 32,    // Start by printing indentation of progname+2 blanks
   MSG2_FLUSH = 64,      // Flush before and after printing
+  MSG2_LEFT_MARGIN = 128, // Print \n unless last character printed was \n
 };
 
 // Functions to record a callback