diff --git a/configure.ac b/configure.ac
index 7c8e1803d..22bc887b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@
 # ---------------
 
 # Initialization of configure
-AC_INIT([ngspice], [34], [http://ngspice.sourceforge.net/bugrep.html])
+AC_INIT([ngspice], [34+], [http://ngspice.sourceforge.net/bugrep.html])
 
 # Unique file in the source directory
 AC_CONFIG_SRCDIR([src/ngspice.c])
diff --git a/visualc/src/include/ngspice/config.h b/visualc/src/include/ngspice/config.h
index ceb6d2212..52af3aabc 100644
--- a/visualc/src/include/ngspice/config.h
+++ b/visualc/src/include/ngspice/config.h
@@ -449,7 +449,7 @@
 #define PACKAGE "ngspice"
 
 /* Version number of package */
-#define VERSION "34" //" Built on " __DATE__ " at " __TIME__
+#define VERSION "34+" //" Built on " __DATE__ " at " __TIME__
 
 /* Define to the address where bug reports for this package should be sent. */
 #define PACKAGE_BUGREPORT "http://ngspice.sourceforge.net/bugrep.html"