1 files changed, 8 insertions, 0 deletions
diff --git a/src/ecbor_internal.h b/src/ecbor_internal.h
index 7b29546..abeaf97 100644
--- a/src/ecbor_internal.h
+++ b/src/ecbor_internal.h
@@ -30,6 +30,14 @@ enum {
   ECBOR_ADDITIONAL_INDEFINITE         = 31
 };
 
+/* Simple value meanings */
+enum {
+  ECBOR_SIMPLE_FALSE                  = 20,
+  ECBOR_SIMPLE_TRUE                   = 21,
+  ECBOR_SIMPLE_NULL                   = 22,
+  ECBOR_SIMPLE_UNDEFINED              = 23
+};
+
 /*
  * Endianness
  */