diff --git a/src/vars.c b/src/vars.c
index 15dcb3c..5b35aa3 100644
--- a/src/vars.c
+++ b/src/vars.c
@@ -55,7 +55,7 @@
 	case SCOPE_SESS:
 		return sess ? &sess->vars : NULL;
 	case SCOPE_CHECK: {
-			struct check *check = objt_check(sess->origin);
+			struct check *check = sess ? objt_check(sess->origin) : NULL;
 
 			return check ? &check->vars : NULL;
 		}