diff --git a/configure.ac b/configure.ac
index 5c4a567e4..a19e417e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -116,9 +116,9 @@ LT_INIT([shared static])
 #
 #  --> Set 'LT_NGSPICE_AGE' to 0.
 
-LT_NGSPICE_CURRENT=2
+LT_NGSPICE_CURRENT=0
 LT_NGSPICE_REVISION=9
-LT_NGSPICE_AGE=2
+LT_NGSPICE_AGE=0
 LIBNGSPICE_SO_VERSION=$LT_NGSPICE_CURRENT.$LT_NGSPICE_REVISION.$LT_NGSPICE_AGE
 
 # Announce the libtool version