diff --git a/src/vs/workbench/services/search/node/fileSearch.ts b/src/vs/workbench/services/search/node/fileSearch.ts
index 1d65b05af4f3a94f09be8ec2858353100b650730..efcdab59c0177176faa5d4d372f8212a7f440aed 100644
--- a/src/vs/workbench/services/search/node/fileSearch.ts
+++ b/src/vs/workbench/services/search/node/fileSearch.ts
@@ -135,7 +135,7 @@ export class FileWalker {
 			if (extraFiles) {
 				extraFiles.forEach(extraFilePath => {
 					const basename = paths.basename(extraFilePath);
-					if (!this.globalExcludePattern || this.globalExcludePattern(extraFilePath, basename)) {
+					if (this.globalExcludePattern && this.globalExcludePattern(extraFilePath, basename)) {
 						return; // excluded
 					}