diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/service/OperationCanceledManager.xtend b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/service/OperationCanceledManager.xtend
index 54321711f..7cd8a64da 100644
--- a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/service/OperationCanceledManager.xtend
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/service/OperationCanceledManager.xtend
@@ -41,7 +41,7 @@ class OperationCanceledManager {
 			throw t;
 		}
 		val opCanceledException = getPlatformOperationCanceledException(t);
-		if (opCanceledException != null)
+		if (opCanceledException !== null)
 			throw new OperationCanceledError(opCanceledException);
 	}