diff --git a/src/juce_appframework/application/juce_ApplicationCommandManager.cpp b/src/juce_appframework/application/juce_ApplicationCommandManager.cpp
index 3f3d98aeb1..9a785dee2f 100644
--- a/src/juce_appframework/application/juce_ApplicationCommandManager.cpp
+++ b/src/juce_appframework/application/juce_ApplicationCommandManager.cpp
@@ -38,6 +38,7 @@ BEGIN_JUCE_NAMESPACE
 #include "../gui/components/keyboard/juce_KeyPressMappingSet.h"
 #include "../gui/components/windows/juce_ResizableWindow.h"
 #include "../gui/components/juce_Desktop.h"
+#include "../events/juce_MessageManager.h"
 
 
 //==============================================================================
@@ -192,7 +193,7 @@ bool ApplicationCommandManager::invoke (const ApplicationCommandTarget::Invocati
 {
     // This call isn't thread-safe for use from a non-UI thread without locking the message
     // manager first..
-    checkMessageManagerIsLocked
+    jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
 
     ApplicationCommandTarget* const target = getFirstCommandTarget (info_.commandID);