diff --git a/src/tint/reader/wgsl/lexer.cc b/src/tint/reader/wgsl/lexer.cc
index 9ebe5d8..89804f2 100644
--- a/src/tint/reader/wgsl/lexer.cc
+++ b/src/tint/reader/wgsl/lexer.cc
@@ -1141,6 +1141,9 @@
     if (str == "continuing") {
         return {Token::Type::kContinuing, source, "continuing"};
     }
+    if (str == "diagnostic") {
+        return {Token::Type::kDiagnostic, source, "diagnostic"};
+    }
     if (str == "discard") {
         return {Token::Type::kDiscard, source, "discard"};
     }
diff --git a/src/tint/reader/wgsl/lexer_test.cc b/src/tint/reader/wgsl/lexer_test.cc
index a7c13e6..ffa85bd 100644
--- a/src/tint/reader/wgsl/lexer_test.cc
+++ b/src/tint/reader/wgsl/lexer_test.cc
@@ -1061,8 +1061,10 @@
                     TokenData{"continue", Token::Type::kContinue},
                     TokenData{"continuing", Token::Type::kContinuing},
                     TokenData{"default", Token::Type::kDefault},
+                    TokenData{"diagnostic", Token::Type::kDiagnostic},
                     TokenData{"discard", Token::Type::kDiscard},
                     TokenData{"else", Token::Type::kElse},
+                    TokenData{"enable", Token::Type::kEnable},
                     TokenData{"f32", Token::Type::kF32},
                     TokenData{"fallthrough", Token::Type::kFallthrough},
                     TokenData{"false", Token::Type::kFalse},
diff --git a/src/tint/reader/wgsl/token.cc b/src/tint/reader/wgsl/token.cc
index ac5eb08..8e3fbdb 100644
--- a/src/tint/reader/wgsl/token.cc
+++ b/src/tint/reader/wgsl/token.cc
@@ -153,6 +153,8 @@
             return "continue";
         case Token::Type::kContinuing:
             return "continuing";
+        case Token::Type::kDiagnostic:
+            return "diagnostic";
         case Token::Type::kDiscard:
             return "discard";
         case Token::Type::kDefault:
diff --git a/src/tint/reader/wgsl/token.h b/src/tint/reader/wgsl/token.h
index 3f92f48..2aeffa9 100644
--- a/src/tint/reader/wgsl/token.h
+++ b/src/tint/reader/wgsl/token.h
@@ -163,6 +163,8 @@
         kContinue,
         /// A 'continuing'
         kContinuing,
+        /// A 'diagnostic'
+        kDiagnostic,
         /// A 'discard'
         kDiscard,
         /// A 'default'