diff --git a/modules/juce_core/native/juce_BasicNativeHeaders.h b/modules/juce_core/native/juce_BasicNativeHeaders.h
index 5f778827c7..6b05033551 100644
--- a/modules/juce_core/native/juce_BasicNativeHeaders.h
+++ b/modules/juce_core/native/juce_BasicNativeHeaders.h
@@ -117,6 +117,10 @@
   #include <comutil.h>
  #endif
 
+ #ifndef S_FALSE
+  #define S_FALSE (1) // (apparently some obscure win32 dev environments don't define this)
+ #endif
+
  #undef PACKED
 
  #if JUCE_MSVC