diff --git a/configure.ac b/configure.ac
index 27bf6abfd..e2d91f29c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -776,7 +776,7 @@ XPROTO="xproto >= 7.0.22"
 RANDRPROTO="randrproto >= 1.2.99.3"
 RENDERPROTO="renderproto >= 0.11"
 XEXTPROTO="xextproto >= 7.1.99"
-INPUTPROTO="inputproto >= 2.0.99.1"
+INPUTPROTO="inputproto >= 2.1.99.3"
 KBPROTO="kbproto >= 1.0.3"
 FONTSPROTO="fontsproto"
 FIXESPROTO="fixesproto >= 5.0"