diff --git a/configure.ac b/configure.ac
index f8e9448bf..6a1b3acec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_PREREQ(2.63)
 AUTOMAKE_OPTIONS = 1.11
 
-AC_INIT([construct], [1.0])
+AC_INIT([construct], [1.0-dev])
 AC_GNU_SOURCE
 AC_USE_SYSTEM_EXTENSIONS
 AC_CONFIG_MACRO_DIR([m4])