diff --git a/asm/parser.c b/asm/parser.c
index a20ef943..7b4cc5cb 100644
--- a/asm/parser.c
+++ b/asm/parser.c
@@ -390,7 +390,7 @@ static int value_to_extop(expr * vect, extop *eop, int32_t myseg)
         if (!vect->value)       /* zero term, safe to ignore */
             continue;
 
-        if (vect->type < EXPR_SIMPLE)  /* false if a register is present */
+        if (vect->type <= EXPR_REG_END) /* false if a register is present */
             return -1;
 
         if (vect->type == EXPR_UNKNOWN) /* something we can't resolve yet */