1 files changed, 2 insertions, 0 deletions
diff --git a/parser.c b/parser.c
index 123da487..423d7855 100644
--- a/parser.c
+++ b/parser.c
@@ -900,6 +900,8 @@ is_expression:
             value = evaluate(stdscan, NULL, &tokval, &op->opflags,
                              critical, nasm_error, &hints);
             i = tokval.t_type;
+            if (!value)
+                goto fail;
 
             if (parse_mref(&o2, value))
                 goto fail;