diff --git a/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/browser/WebKit.java b/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/browser/WebKit.java
index 7d475d3..bc2d71b 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/browser/WebKit.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT WebKit/gtk/org/eclipse/swt/browser/WebKit.java
@@ -1891,13 +1891,23 @@
 	 * You should check 'retObj.swtAsyncTimeout' after making a call to this.
 	 */
 	private static Webkit2AsyncReturnObj execAsyncAndWaitForReturn(Browser browser, Consumer<Integer> asyncFunc, String additionalErrorInfo) {
+		class CtxIteration implements Runnable {
+			boolean eventsDispatched;
+
+			@Override
+			public void run() {
+				eventsDispatched = OS.g_main_context_iteration (0, false);
+			}
+		}
+
 		Webkit2AsyncReturnObj retObj = new Webkit2AsyncReturnObj();
 		int callbackId = CallBackMap.putObject(retObj);
 		asyncFunc.accept(callbackId);
 		Display display = browser.getDisplay();
 		final Instant timeOut = Instant.now().plusMillis(ASYNC_EXEC_TIMEOUT_MS);
 		while (!browser.isDisposed()) {
-			boolean eventsDispatched = OS.g_main_context_iteration (0, false);
+			CtxIteration ctxIteration = new CtxIteration();
+			display.asyncExec(ctxIteration);
 			if (retObj.callbackFinished)
 				break;
 			else if (Instant.now().isAfter(timeOut)) {
@@ -1916,7 +1926,7 @@
 				retObj.swtAsyncTimeout = true;
 				break;
 			}
-			else if (!eventsDispatched)
+			else if (!ctxIteration.eventsDispatched)
 				display.sleep();
 		}
 		CallBackMap.removeObject(callbackId);