diff --git a/configure.ac b/configure.ac
index d800e45a..956a182d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # configure.ac
 
-AC_INIT([tmux], 3.4)
+AC_INIT([tmux], next-3.5)
 AC_PREREQ([2.60])
 
 AC_CONFIG_AUX_DIR(etc)