diff --git a/quote.c b/quote.c
index 7920e18e44..890885a736 100644
--- a/quote.c
+++ b/quote.c
@@ -7,6 +7,7 @@ int quote_path_fully = 1;
 /* Help to copy the thing properly quoted for the shell safety.
  * any single quote is replaced with '\'', any exclamation point
  * is replaced with '\!', and the whole thing is enclosed in a
+ * single quote pair.
  *
  * E.g.
  *  original     sq_quote     result