diff --git a/libraries/AP_Common/AP_FWVersionDefine.h b/libraries/AP_Common/AP_FWVersionDefine.h
index fa5859cba2..6570b8107c 100644
--- a/libraries/AP_Common/AP_FWVersionDefine.h
+++ b/libraries/AP_Common/AP_FWVersionDefine.h
@@ -34,6 +34,11 @@
 #define ORIGINAL_FWSTR nullptr
 #endif
 
+/**
+ * The version number should be used when the structure is updated
+ * Major: For breaking changes of the structure
+ * Minor: For new fields that does not brake the structure or corrections
+ */
 const AP_FWVersion AP_FWVersion::fwver{
     // Version header struct
     .header = 0x61706677766572fb, // First 7 MSBs: "apfwver", LSB is the checksum of the previous string: 0xfb