diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index 9c122fa03e3df..7f06347070389 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -15,9 +15,9 @@ declare module 'vscode' {
 
 	export interface TextSearchQuery {
 		pattern: string;
-		isRegExp?: boolean;
-		isCaseSensitive?: boolean;
-		isWordMatch?: boolean;
+		isRegExp: boolean;
+		isCaseSensitive: boolean;
+		isWordMatch: boolean;
 	}
 
 	export interface SearchOptions {
diff --git a/src/vs/workbench/api/node/extHostSearch.ts b/src/vs/workbench/api/node/extHostSearch.ts
index 0f8c774dd7304..c4cf892bd17ce 100644
--- a/src/vs/workbench/api/node/extHostSearch.ts
+++ b/src/vs/workbench/api/node/extHostSearch.ts
@@ -454,7 +454,7 @@ class TextSearchEngine {
 			new TPromise(resolve => process.nextTick(resolve))
 				.then(() => {
 					this.activeCancellationTokens.add(cancellation);
-					return this.provider.provideTextSearchResults(this.pattern, searchOptions, progress, cancellation.token);
+					return this.provider.provideTextSearchResults(patternInfoToQuery(this.pattern), searchOptions, progress, cancellation.token);
 				})
 				.then(() => {
 					this.activeCancellationTokens.delete(cancellation);
@@ -500,6 +500,15 @@ class TextSearchEngine {
 	}
 }
 
+function patternInfoToQuery(patternInfo: IPatternInfo): vscode.TextSearchQuery {
+	return <vscode.TextSearchQuery>{
+		isCaseSensitive: patternInfo.isCaseSensitive || false,
+		isRegExp: patternInfo.isRegExp || false,
+		isWordMatch: patternInfo.isWordMatch || false,
+		pattern: patternInfo.pattern
+	};
+}
+
 class FileSearchEngine {
 	private filePattern: string;
 	private normalizedFilePatternLowercase: string;