diff --git a/src/juce_appframework/audio/audio_file_formats/juce_AudioThumbnail.h b/src/juce_appframework/audio/audio_file_formats/juce_AudioThumbnail.h
index 10c4113c1f..4cbda9c90b 100644
--- a/src/juce_appframework/audio/audio_file_formats/juce_AudioThumbnail.h
+++ b/src/juce_appframework/audio/audio_file_formats/juce_AudioThumbnail.h
@@ -166,6 +166,7 @@ private:
 
     int numChannelsCached, numSamplesCached;
     double cachedStart, cachedTimePerPixel;
+    bool cacheNeedsRefilling;
 
     void clear();