--- a/configure.ac
+++ b/configure.ac
@@ -1486,7 +1486,7 @@
 	CPPFLAGS="-DGDK_DISABLE_DEPRECATED $CPPFLAGS"
 	CPPFLAGS="-DGTK_DISABLE_DEPRECATED $CPPFLAGS"
 	CPPFLAGS="-DGTK_DISABLE_SINGLE_INCLUDES $CPPFLAGS"
-	if test ! \( $gtk_config_major_version -eq 2 -a $gtk_config_minor_version -lt 20 \) ; then
+	if test ! \( $gtk_config_major_version -ge 2 -a $gtk_config_minor_version -lt 20 \) ; then
 		# Enable GSEAL when building with GTK > 2.20
 		# (Versions prior to 2.22 lacked some necessary accessors.)
 		CPPFLAGS="-DGSEAL_ENABLE $CPPFLAGS"