diff --git a/bindings/gumjs/gumquickeventsink.c b/bindings/gumjs/gumquickeventsink.c
index ee18ac1d2..3fba7d9dc 100644
--- a/bindings/gumjs/gumquickeventsink.c
+++ b/bindings/gumjs/gumquickeventsink.c
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2020 Ole André Vadla Ravnås <oleavr@nowsecure.com>
+ * Copyright (C) 2020-2024 Ole André Vadla Ravnås <oleavr@nowsecure.com>
+ * Copyright (C) 2024 Alex Soler <asoler@nowsecure.com>
+ * Copyright (C) 2024 Francesco Tamagni <mrmacete@protonmail.ch>
  *
  * Licence: wxWindows Library Licence, Version 3.1
  */
@@ -222,7 +224,12 @@ gum_quick_js_event_sink_process (GumEventSink * sink,
 static void
 gum_quick_js_event_sink_flush (GumEventSink * sink)
 {
-  gum_quick_js_event_sink_drain (GUM_QUICK_JS_EVENT_SINK (sink));
+  GumQuickJSEventSink * self = GUM_QUICK_JS_EVENT_SINK (sink);
+
+  if (self->core == NULL)
+    return;
+
+  gum_quick_js_event_sink_drain (self);
 }
 
 static void
diff --git a/bindings/gumjs/gumv8eventsink.cpp b/bindings/gumjs/gumv8eventsink.cpp
index 229e6b39b..68c7e1d55 100644
--- a/bindings/gumjs/gumv8eventsink.cpp
+++ b/bindings/gumjs/gumv8eventsink.cpp
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2012-2022 Ole André Vadla Ravnås <oleavr@nowsecure.com>
+ * Copyright (C) 2012-2024 Ole André Vadla Ravnås <oleavr@nowsecure.com>
+ * Copyright (C) 2024 Alex Soler <asoler@nowsecure.com>
+ * Copyright (C) 2024 Francesco Tamagni <mrmacete@protonmail.ch>
  *
  * Licence: wxWindows Library Licence, Version 3.1
  */
@@ -226,7 +228,12 @@ gum_v8_js_event_sink_process (GumEventSink * sink,
 static void
 gum_v8_js_event_sink_flush (GumEventSink * sink)
 {
-  gum_v8_js_event_sink_drain (GUM_V8_JS_EVENT_SINK (sink));
+  auto self = GUM_V8_JS_EVENT_SINK (sink);
+
+  if (self->core == NULL)
+    return;
+
+  gum_v8_js_event_sink_drain (self);
 }
 
 static void