diff --git a/glossary/SSL.md b/glossary/SSL.md
index bb62da504..81dc2d2dc 100644
--- a/glossary/SSL.md
+++ b/glossary/SSL.md
@@ -1,3 +1,3 @@
 ### SSL
 
-Secure Sockets Layer known as SSL is a protocol for transferring private data across the Internet. SSL uses a cryptographic system that uses two keys to encrypt data.
+Secure Sockets Layer known as SSL is a protocol for transferring private data across the Internet. SSL uses a cryptographic system that uses two keys to encrypt data. SSL is the predecessor to Transport Layer Security (TLS).