diff --git a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
index fc564a3f92..ed05018b44 100644
--- a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
+++ b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
@@ -55,6 +55,8 @@
  #include <CoreAudioKit/AUViewController.h>
 #endif
 
+#include <unordered_map>
+
 namespace juce
 {
 
diff --git a/modules/juce_core/system/juce_StandardHeader.h b/modules/juce_core/system/juce_StandardHeader.h
index b4ae07f6f8..db8b2cab49 100644
--- a/modules/juce_core/system/juce_StandardHeader.h
+++ b/modules/juce_core/system/juce_StandardHeader.h
@@ -51,7 +51,6 @@
 #include <algorithm>
 #include <limits>
 #include <sstream>
-#include <unordered_map>
 
 //==============================================================================
 #include "juce_CompilerSupport.h"