diff --git a/source/modules/juce_core/threads/juce_WaitableEvent.h b/source/modules/juce_core/threads/juce_WaitableEvent.h
index 3e31a9772..dd4685aa6 100644
--- a/source/modules/juce_core/threads/juce_WaitableEvent.h
+++ b/source/modules/juce_core/threads/juce_WaitableEvent.h
@@ -20,6 +20,10 @@
   ==============================================================================
 */
 
+#if JUCE_MINGW
+#include "../../hylia/mingw-std-threads/mingw.condition_variable.h"
+#endif
+
 namespace juce
 {