diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 0eac58b..b3faec8 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1186,9 +1186,9 @@
     int
 prof_def_func()
 {
-    scriptitem_T    *si = &SCRIPT_ITEM(current_SID);
-
-    return si->sn_pr_force;
+    if (current_SID > 0)
+	return SCRIPT_ITEM(current_SID).sn_pr_force;
+    return FALSE;
 }
 
 # endif