diff --git a/src/charset.c b/src/charset.c
index e47fd89..a8173c1 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -921,6 +921,7 @@
     cts->cts_text_prop_count = 0;
     cts->cts_has_prop_with_text = FALSE;
     cts->cts_cur_text_width = 0;
+    cts->cts_with_trailing = 0;
     if (lnum > 0)
     {
 	char_u *prop_start;