diff --git a/lib/strtoofft.c b/lib/strtoofft.c
index 391f80d24..a0aab9037 100644
--- a/lib/strtoofft.c
+++ b/lib/strtoofft.c
@@ -24,6 +24,14 @@
 #include "setup.h"
 #include "strtoofft.h"
 
+/*
+ * NOTE:
+ *
+ * In the ISO C standard (IEEE Std 1003.1), there is a strtoimax() function we
+ * could use in case strtoll() doesn't exist...  See
+ * http://www.opengroup.org/onlinepubs/009695399/functions/strtoimax.html
+ */
+
 #ifdef NEED_CURL_STRTOLL
 #include <stdlib.h>
 #include <ctype.h>