1 files changed, 2 insertions, 0 deletions
diff --git a/nslcd.h b/nslcd.h
index c9857d6..9083cc1 100644
--- a/nslcd.h
+++ b/nslcd.h
@@ -195,6 +195,8 @@
      INT32   inact
      INT32   expire
      INT32   flag */
+/* It is my understanding that an empty value for those INT32 fields
+   is expressed with a negative number. -- lukeshu */
 #define NSLCD_ACTION_SHADOW_BYNAME     0x000c0001
 #define NSLCD_ACTION_SHADOW_ALL        0x000c0008