diff -r f752bc4c3e21 -r b317bb7479e5 pidgin/gtkblist.c
--- a/pidgin/gtkblist.c	Fri Jan 22 19:29:23 2021 -0600
+++ b/pidgin/gtkblist.c	Sat Jan 23 20:26:48 2021 -0600
@@ -5538,6 +5538,9 @@
 	if (!gtknode->row)
 		return FALSE;
 
+	if (!GTK_IS_TREE_MODEL(gtkblist->treemodel)) {
+		return FALSE;
+	}
 
 	if ((path = gtk_tree_row_reference_get_path(gtknode->row)) == NULL)
 		return FALSE;