--- a/configure.in
+++ b/configure.in
@@ -136,7 +136,7 @@
     [  --with-tkconfig=<path>  directory that contains tkConfig.sh],
     tkconfig="$withval")
 
-if test -n "$kconfig"; then
+if test -n "$tkconfig"; then
     tkConfigSH="$tkconfig/tkConfig.sh"
 else
     changequote(,)