diff --git a/extensions/typescript/src/features/completionItemProvider.ts b/extensions/typescript/src/features/completionItemProvider.ts
index 0d8aa23eb08..f3800d5cd10 100644
--- a/extensions/typescript/src/features/completionItemProvider.ts
+++ b/extensions/typescript/src/features/completionItemProvider.ts
@@ -400,7 +400,7 @@ export default class TypeScriptCompletionItemProvider implements CompletionItemP
 
 	private snippetForFunctionCall(detail: CompletionEntryDetails): SnippetString {
 		const suggestionArgumentNames: string[] = [];
-		let hasOptionalParemters = false;
+		let hasOptionalParemeters = false;
 		let parenCount = 0;
 		let i = 0;
 		for (; i < detail.displayParts.length; ++i) {
@@ -413,7 +413,7 @@ export default class TypeScriptCompletionItemProvider implements CompletionItemP
 				if (!nameIsFollowedByOptionalIndicator) {
 					suggestionArgumentNames.push(`\${${i + 1}:${part.text}}`);
 				}
-				hasOptionalParemters = hasOptionalParemters || nameIsFollowedByOptionalIndicator;
+				hasOptionalParemeters = hasOptionalParemeters || nameIsFollowedByOptionalIndicator;
 			} else if (part.kind === 'punctuation') {
 				if (part.text === '(') {
 					++parenCount;
@@ -421,12 +421,12 @@ export default class TypeScriptCompletionItemProvider implements CompletionItemP
 					--parenCount;
 				} else if (part.text === '...' && parenCount === 1) {
 					// Found rest parmeter. Do not fill in any further arguments
-					hasOptionalParemters = true;
+					hasOptionalParemeters = true;
 					break;
 				}
 			}
 		}
-		const codeSnippet = `${detail.name}(${suggestionArgumentNames.join(', ')}${hasOptionalParemters ? '${' + i + '}' : ''})$0`;
+		const codeSnippet = `${detail.name}(${suggestionArgumentNames.join(', ')}${hasOptionalParemeters ? '${' + i + '}' : ''})$0`;
 		return new SnippetString(codeSnippet);
 	}