1 files changed, 1 insertions, 1 deletions

diff --git a/pb.h b/pb.h
index 46d7c2ce..1d32ee9b 100644
--- a/pb.h
+++ b/pb.h
@@ -12,7 +12,7 @@
 #define pb_packed
 #endif
 
-/* Wire types */
+/* Wire types. Library user needs these only in encoder callbacks. */
 typedef enum {
     PB_WT_VARINT = 0,
     PB_WT_64BIT  = 1,