diff --git a/src/regexp.c b/src/regexp.c
index e055dd3..b761641 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -5582,7 +5582,7 @@
 			if (has_mbyte)
 			{
 			    char_u *line =
-					 reg_getline(behind_pos.rs_u.pos.lnum);
+				  reg_getline(rp->rs_un.regsave.rs_u.pos.lnum);
 
 			    rp->rs_un.regsave.rs_u.pos.col -=
 				(*mb_head_off)(line, line