diff --git a/interface/wx/thread.h b/interface/wx/thread.h
index 89eccc0b13..328879c901 100644
--- a/interface/wx/thread.h
+++ b/interface/wx/thread.h
@@ -518,6 +518,10 @@ enum wxCriticalSectionType
     @library{wxbase}
     @category{threading}
 
+    @note Critical sections can be used before the wxWidgets library is fully
+          initialized. In particular, it's safe to create global
+          wxCriticalSection instances.
+
     @see wxThread, wxCondition, wxCriticalSectionLocker
 */
 class wxCriticalSection