diff --git a/gtkglext/configure.in b/gtkglext/configure.in
index e5b678c..a031505 100644
--- a/gtkglext/configure.in
+++ b/gtkglext/configure.in
@@ -61,7 +61,7 @@ m4_define([pango_required_version], [1.0.0])
 
 # Pangox
 m4_define([pangox_pkg], [pangox])
-m4_define([pangox_required_version], [1.0.0])
+m4_define([pangox_required_version], [0.0.0])
 
 # PangoFT2
 m4_define([pangoft2_pkg], [pangoft2])