diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index cb7cccb5470..f6196071caf 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1440,7 +1440,7 @@ Actual: ${stringify(fullActual)}`);
                     this.raiseError(`Expected no signature help, but got "${stringify(actual)}"`);
                 }
                 else {
-                    this.raiseError("Expected signature help, but none was returned.")
+                    this.raiseError("Expected signature help, but none was returned.");
                 }
             }
         }
diff --git a/src/server/protocol.ts b/src/server/protocol.ts
index ad70ca4f258..f4b251f8702 100644
--- a/src/server/protocol.ts
+++ b/src/server/protocol.ts
@@ -2090,8 +2090,8 @@ namespace ts.server.protocol {
      * The language service will unconditionally attempt to provide a result.
      */
     export interface SignatureHelpInvokedReason {
-        kind: "invoked",
-        triggerCharacter?: undefined,
+        kind: "invoked";
+        triggerCharacter?: undefined;
     }
 
     /**
@@ -2099,11 +2099,11 @@ namespace ts.server.protocol {
      * Depending on the character and the syntactic context, the request may or may not be served a result.
      */
     export interface SignatureHelpCharacterTypedReason {
-        kind: "characterTyped",
+        kind: "characterTyped";
         /**
          * Character that was responsible for triggering signature help.
          */
-        triggerCharacter: SignatureHelpTriggerCharacter,
+        triggerCharacter: SignatureHelpTriggerCharacter;
     }
 
     /**
@@ -2113,11 +2113,11 @@ namespace ts.server.protocol {
      * `triggerCharacter` can be `undefined` for a retrigger caused by a cursor move.
      */
     export interface SignatureHelpRetriggeredReason {
-        kind: "retrigger",
+        kind: "retrigger";
         /**
          * Character that was responsible for triggering signature help.
          */
-        triggerCharacter?: SignatureHelpRetriggerCharacter,
+        triggerCharacter?: SignatureHelpRetriggerCharacter;
     }
 
     /**
diff --git a/src/services/types.ts b/src/services/types.ts
index e586f486a0b..10b342990b1 100644
--- a/src/services/types.ts
+++ b/src/services/types.ts
@@ -399,8 +399,8 @@ namespace ts {
      * The language service will unconditionally attempt to provide a result.
      */
     export interface SignatureHelpInvokedReason {
-        kind: "invoked",
-        triggerCharacter?: undefined,
+        kind: "invoked";
+        triggerCharacter?: undefined;
     }
 
     /**
@@ -408,11 +408,11 @@ namespace ts {
      * Depending on the character and the syntactic context, the request may or may not be served a result.
      */
     export interface SignatureHelpCharacterTypedReason {
-        kind: "characterTyped",
+        kind: "characterTyped";
         /**
          * Character that was responsible for triggering signature help.
          */
-        triggerCharacter: SignatureHelpTriggerCharacter,
+        triggerCharacter: SignatureHelpTriggerCharacter;
     }
 
     /**
@@ -422,11 +422,11 @@ namespace ts {
      * `triggerCharacter` can be `undefined` for a retrigger caused by a cursor move.
      */
     export interface SignatureHelpRetriggeredReason {
-        kind: "retrigger",
+        kind: "retrigger";
         /**
          * Character that was responsible for triggering signature help.
          */
-        triggerCharacter?: SignatureHelpRetriggerCharacter,
+        triggerCharacter?: SignatureHelpRetriggerCharacter;
     }
 
     export interface ApplyCodeActionCommandResult {