diff --git a/configure.in b/configure.in
index b804064..b7749bf 100644
--- a/configure.in
+++ b/configure.in
@@ -43,7 +43,7 @@ dnl bump revision when fixing bugs
 dnl bump current and age, reset revision to zero when adding APIs
 dnl bump current, leave age, reset revision to zero when changing/removing APIS
 LIBT_CURRENT=5
-LIBT_REVISION=3
+LIBT_REVISION=4
 AC_SUBST(LIBT_CURRENT)
 AC_SUBST(LIBT_REVISION)
 LIBT_AGE=4