diff --git a/configure.ac b/configure.ac
index 751309e9..3499ab42 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ PKG_PROG_PKG_CONFIG
 AM_PROG_LIBTOOL
 
 ## increment if the interface has additions, changes, removals.
-LT_CURRENT=1
+LT_CURRENT=2
 
 ## increment any time the source changes; set to
 ##  0 if you increment CURRENT