diff --git a/include/ap_mmn.h b/include/ap_mmn.h
index 9c83bbb5a8..34abf61654 100644
--- a/include/ap_mmn.h
+++ b/include/ap_mmn.h
@@ -732,7 +732,7 @@
 #ifndef MODULE_MAGIC_NUMBER_MAJOR
 #define MODULE_MAGIC_NUMBER_MAJOR 20211221
 #endif
-#define MODULE_MAGIC_NUMBER_MINOR 20             /* 0...n */
+#define MODULE_MAGIC_NUMBER_MINOR 21             /* 0...n */
 
 /**
  * Determine if the server's current MODULE_MAGIC_NUMBER is at least a