diff --git a/headers/os/codec/MetaData.h b/headers/os/codec/MetaData.h
index 3ec9e04748..a721342102 100644
--- a/headers/os/codec/MetaData.h
+++ b/headers/os/codec/MetaData.h
@@ -92,7 +92,7 @@ extern const char* kProgramData;		// BMetaData
  *
  * The metadata model is sparse and each key can occur at most once,
  * except for BMetaData itself.
- * The key is an integer and the value is the actual metadata.
+ * The key is a const char and the value is the actual metadata.
  * The client of this class is required to know in advance the type
  * of a particular metadata key.
  */