diff --git a/src/terminal.c b/src/terminal.c
index c681f3a..1fc0ef9 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -3451,6 +3451,10 @@
 	    sizeof(sb_line_T) * gap->ga_len);
     if (update_buffer)
 	term->tl_scrollback_scrolled -= todo;
+
+    // make sure cursor is on a valid line
+    if (curbuf == term->tl_buffer)
+	check_cursor();
 }
 
 /*
diff --git a/src/version.c b/src/version.c
index 1536859..bfcb7bf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    643,
+/**/
     642,
 /**/
     641,