diff --git a/WPS/geogrid/src/module_stringutil.F b/WPS/geogrid/src/module_stringutil.F
new file mode 120000
index 000000000..305c294e5
--- /dev/null
+++ b/WPS/geogrid/src/module_stringutil.F
@@ -0,0 +1 @@
+../../ungrib/src/module_stringutil.F
\ No newline at end of file