1 files changed, 12 insertions, 0 deletions
diff --git a/lib/hash.h b/lib/hash.h
index 2d00a334..efa7011b 100644
--- a/lib/hash.h
+++ b/lib/hash.h
@@ -13,6 +13,18 @@
 extern "C" {
 #endif
 
+/*
+ * NOTICE:
+ *
+ * If you are reading this file in an effort to add a new hash structure
+ * this is the wrong place to be using it.  Please see the typesafe
+ * data structures, or ask one of the other developers.
+ *
+ * If you are reading this file as a way to update an existing usage
+ * of this data structure, please consider just converting the data
+ * structure to one of the typesafe data structures instead.
+ */
+
 /* Default hash table size.  */
 #define HASH_INITIAL_SIZE 256
 /* Expansion threshold */