diff --git a/modules/juce_gui_basics/native/juce_Windowing_android.cpp b/modules/juce_gui_basics/native/juce_Windowing_android.cpp
index 112c01009d..22f446f709 100644
--- a/modules/juce_gui_basics/native/juce_Windowing_android.cpp
+++ b/modules/juce_gui_basics/native/juce_Windowing_android.cpp
@@ -2084,6 +2084,7 @@ public:
 
     void appStyleChanged() override
     {
+        JUCE_ASSERT_MESSAGE_THREAD
         refreshSystemBarsAndSetHidden (navBarsHidden);
     }