diff --git a/configure.ac b/configure.ac
index 05098a62f..e4839d18b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ dnl however, the use of '~' should be fine as apt (others?) will treat
 dnl it as an earlier version than the actual release.  TNX KA6MAL
 dnl PACKAGE_NAME + " " + PACKAGE_VERSION must not exceed 20 chars!
 AC_INIT([Hamlib],
-        [4.0~git],
+        [4.1~git],
         [hamlib-developer@lists.sourceforge.net],
         [hamlib],
         [http://www.hamlib.org])
@@ -61,7 +61,7 @@ dnl See README.release on setting these values
 # Values given to -version-info when linking.  See libtool documentation.
 # Set them here to keep c++/Makefile and src/Makefile in sync.
 ABI_VERSION=4
-ABI_REVISION=0
+ABI_REVISION=1
 ABI_AGE=0
 
 AC_DEFINE_UNQUOTED([ABI_VERSION], [$ABI_VERSION], [Frontend ABI version])