diff --git a/terminal.c b/terminal.c
index c1a12c04..528f8f9b 100644
--- a/terminal.c
+++ b/terminal.c
@@ -1633,6 +1633,13 @@ void term_clrsb(Terminal *term)
     for (i = 0; i < term->rows; i++)
         check_line_size(term, scrlineptr(i));
 
+    /*
+     * That operation has invalidated the selection, if it overlapped
+     * the scrollback at all.
+     */
+    if (term->selstate != NO_SELECTION && term->selstart.y < 0)
+        deselect(term);
+
     /*
      * There are now no lines of real scrollback which can be pulled
      * back into the screen by a resize, and no lines of the alternate