diff --git a/modules/juce_core/system/juce_TargetPlatform.h b/modules/juce_core/system/juce_TargetPlatform.h
index 6c3a90dd82..63470b668d 100644
--- a/modules/juce_core/system/juce_TargetPlatform.h
+++ b/modules/juce_core/system/juce_TargetPlatform.h
@@ -155,7 +155,7 @@
     #define JUCE_BIG_ENDIAN 1
   #endif
 
-  #if defined (__LP64__) || defined (_LP64)
+  #if defined (__LP64__) || defined (_LP64) || defined (__arm64__)
     #define JUCE_64BIT 1
   #else
     #define JUCE_32BIT 1