diff --git a/src/Makefile.defs b/src/Makefile.defs
index 7f3e4f456c1..46fa5712364 100644
--- a/src/Makefile.defs
+++ b/src/Makefile.defs
@@ -106,7 +106,7 @@ INSTALL_FLAVOUR=$(FLAVOUR)
 # version number
 VERSION = 5
 PATCHLEVEL = 3
-SUBLEVEL = 5
+SUBLEVEL = 6
 EXTRAVERSION = 
 
 # memory manager switcher