diff --git a/examples/GainPlugin/ParamIndicationHelper.h b/examples/GainPlugin/ParamIndicationHelper.h
index 00b72c4..276510a 100644
--- a/examples/GainPlugin/ParamIndicationHelper.h
+++ b/examples/GainPlugin/ParamIndicationHelper.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <unordered_map>
 #include <juce_audio_processors/juce_audio_processors.h>
 
 class ParamIndicationHelper