diff --git a/specification/41_end_to_end_encryption.rst b/specification/41_end_to_end_encryption.rst
index f793babe..02388152 100644
--- a/specification/41_end_to_end_encryption.rst
+++ b/specification/41_end_to_end_encryption.rst
@@ -10,6 +10,6 @@ Matrix optionally supports end-to-end encryption, allowing rooms to be created
 whose conversation contents is not decryptable or interceptable on any of the
 participating homeservers.
 
-End-to-end crypto is still being designed and prototypes - notes on the design
+End-to-end crypto is still being designed and prototyped - notes on the design
 may be found at https://lwn.net/Articles/634144/