diff --git a/src/ops.c b/src/ops.c
index d259cca..beab33c 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -1439,7 +1439,7 @@
 	{
 #ifdef FEAT_MBYTE
 	    if (has_mbyte)
-		c = mb_ptr2char_adv(&arg);
+		c = mb_cptr2char_adv(&arg);
 	    else
 #endif
 		c = *arg++;