diff --git a/ArduSub/Parameters.cpp b/ArduSub/Parameters.cpp
index 8f5438a94f..dbaa311a93 100644
--- a/ArduSub/Parameters.cpp
+++ b/ArduSub/Parameters.cpp
@@ -601,7 +601,7 @@ const AP_Param::Info Sub::var_info[] = {
 
 #if OPTFLOW == ENABLED
     // @Group: FLOW
-    // @Path: ../libraries/AP_OpticalFlow/OpticalFlow.cpp
+    // @Path: ../libraries/AP_OpticalFlow/AP_OpticalFlow.cpp
     GOBJECT(optflow,   "FLOW", OpticalFlow),
 #endif