diff --git a/ArduPlane/commands_process.pde b/ArduPlane/commands_process.pde
index 5ef18b36b1..a5dcffcc82 100644
--- a/ArduPlane/commands_process.pde
+++ b/ArduPlane/commands_process.pde
@@ -50,7 +50,7 @@ static void process_next_command()
 	// and loads conditional or immediate commands if applicable
 	
 	struct Location temp;
-	byte old_index;
+	byte old_index = 0;
 	
 	// these are Navigation/Must commands
 	// ---------------------------------