diff --git a/sorc/ncep_post.fd/gtg_interp.F90 b/sorc/ncep_post.fd/gtg_interp.F90
new file mode 100644
index 000000000..57147900b
--- /dev/null
+++ b/sorc/ncep_post.fd/gtg_interp.F90
@@ -0,0 +1,4 @@
+  subroutine gtg_interp()
+    implicit none
+    print *, "Stub code for GTG protection but to make UPP public to work"
+  end subroutine gtg_interp