--- a/configure.in
+++ b/configure.in
@@ -114,7 +114,7 @@
 AC_SUBST(LIBRAL_LIBS)
 AC_SUBST(LIBRAL_CFLAGS)
 
-PKG_CHECK_MODULES(RUBRICA, gtk+-2.0 >= 2.6 glib-2.0 >= 2.6 libglade-2.0 gconf-2.0 libnotify)
+PKG_CHECK_MODULES(RUBRICA, gtk+-2.0 >= 2.6 glib-2.0 >= 2.6 gthread-2.0 libglade-2.0 gconf-2.0 libnotify)
 AC_SUBST(RUBRICA_LIBS)
 AC_SUBST(RUBRICA_CFLAGS)