diff --git a/plugins/ssh-base/sshd.c b/plugins/ssh-base/sshd.c
index bee87fb6..797b7337 100644
--- a/plugins/ssh-base/sshd.c
+++ b/plugins/ssh-base/sshd.c
@@ -103,7 +103,7 @@ lws_timingsafe_bcmp(const void *a, const void *b, uint32_t len)
 	uint8_t sum = 0;
 
 	while (len--)
-		sum |= (*pa ^ *pb);
+		sum |= (*pa++ ^ *pb++);
 
 	return sum;
 }