diff --git a/src/vs/workbench/parts/tasks/common/problemMatcher.ts b/src/vs/workbench/parts/tasks/common/problemMatcher.ts
index 0f6c621836f48e5a5a776064672216bccb0e6975..813877737db05f7a4b9e4e0efd5f2691edc43525 100644
--- a/src/vs/workbench/parts/tasks/common/problemMatcher.ts
+++ b/src/vs/workbench/parts/tasks/common/problemMatcher.ts
@@ -1068,7 +1068,7 @@ class ProblemPatternRegistryImpl implements IProblemPatternRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {
@@ -1611,7 +1611,7 @@ class ProblemMatcherRegistryImpl implements IProblemMatcherRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {
diff --git a/src/vs/workbench/parts/tasks/common/taskDefinitionRegistry.ts b/src/vs/workbench/parts/tasks/common/taskDefinitionRegistry.ts
index 04fd0427ebe2fcee6183e4937666b93eb4a2dcc3..cc197afc0ce4587dc74e3eaa97ccb0d4c16db54f 100644
--- a/src/vs/workbench/parts/tasks/common/taskDefinitionRegistry.ts
+++ b/src/vs/workbench/parts/tasks/common/taskDefinitionRegistry.ts
@@ -105,7 +105,7 @@ class TaskDefinitionRegistryImpl implements ITaskDefinitionRegistry {
 				}
 				resolve(undefined);
 			});
-		});
+		}, () => { });
 	}
 
 	public onReady(): TPromise<void> {