diff --git a/src/term.c b/src/term.c
index 8144fad..a471c1e 100644
--- a/src/term.c
+++ b/src/term.c
@@ -2978,6 +2978,9 @@
 	Rows = min_rows();
 }
 
+/*
+ * Invoked just before the screen structures are going to be (re)allocated.
+ */
     void
 win_new_shellsize()
 {