diff --git a/common/parse.h b/common/parse.h
index 3f9950ce..bef6bf31 100644
--- a/common/parse.h
+++ b/common/parse.h
@@ -186,7 +186,7 @@ unsigned int
 in_utf16_le_terminated_as_utf8_length(struct stream *s);
 
 /******************************************************************************/
-#define s_check_rem(s, n) ((n) >= 0 && (n) <= (s)->end - (s)->p)
+#define s_check_rem(s, n) ((n) <= (s)->end - (s)->p)
 
 /******************************************************************************/
 /**
@@ -202,7 +202,7 @@ in_utf16_le_terminated_as_utf8_length(struct stream *s);
       && 0 )
 
 /******************************************************************************/
-#define s_check_rem_out(s, n) ((n) >= 0 && (n) <= (s)->size - ((s)->p - (s)->data))
+#define s_check_rem_out(s, n) ((n) <= (s)->size - ((s)->p - (s)->data))
 
 /******************************************************************************/
 /**