diff --git a/configure.in b/configure.in
index a03f009dca2..7eadc5bd241 100644
--- a/configure.in
+++ b/configure.in
@@ -17,7 +17,7 @@ SHARED_LIB_VERSION=$SHARED_LIB_MAJOR_VERSION:0:0
 # ndb version
 NDB_VERSION_MAJOR=4
 NDB_VERSION_MINOR=1
-NDB_VERSION_BUILD=20
+NDB_VERSION_BUILD=21
 NDB_VERSION_STATUS=""
 
 # Set all version vars based on $VERSION. How do we do this more elegant ?