diff --git a/src/linkify-matrix.ts b/src/linkify-matrix.ts
index 429e0bb1514f..4a5d48b35f28 100644
--- a/src/linkify-matrix.ts
+++ b/src/linkify-matrix.ts
@@ -64,8 +64,6 @@ function matrixOpaqueIdLinkifyParser({
         // because 'localhost' is tokenised to the localhost token,
         // usernames @localhost:foo.com are otherwise not matched!
         LOCALHOST,
-        LEFT_BRACKET,
-        RIGHT_BRACKET,
     } = scanner.tokens;
 
     const S_START = parser.start;
@@ -73,6 +71,7 @@ function matrixOpaqueIdLinkifyParser({
 
     const localpartTokens = [
         DOMAIN,
+        // IPV4 necessity
         NUM,
         TLD,
 
@@ -82,8 +81,6 @@ function matrixOpaqueIdLinkifyParser({
         SYM,
         UNDERSCORE,
         TEXT,
-        LEFT_BRACKET,
-        RIGHT_BRACKET,
     ];
 
     const INITIAL_TOKEN_STATE = S_START.tt(token);
@@ -95,7 +92,6 @@ function matrixOpaqueIdLinkifyParser({
     }
 
     const COLON_STATE = LOCALPART_STATE.tt(COLON);
-    COLON_STATE.tt(COLON, LOCALPART_STATE);
 
     COLON_STATE.tt(LOCALHOST, LOCALPART_STATE);
     COLON_STATE.tt(TLD, LOCALPART_STATE);