Index: ocamlpam-1.1/pam_stubs.c
===================================================================
--- ocamlpam-1.1.orig/pam_stubs.c
+++ ocamlpam-1.1/pam_stubs.c
@@ -57,6 +57,7 @@ static int converse(int nMsg, const stru
 	struct pam_response * local_responses;
 	caml_pam_handle * h;
 
+  	CAMLparam0 ();
 	CAMLlocal1(ret);
 
 	h = (caml_pam_handle *)data;