diff --git a/Kernel/Arch/aarch64/Processor.h b/Kernel/Arch/aarch64/Processor.h
index 05d80a237a..f6b76e726d 100644
--- a/Kernel/Arch/aarch64/Processor.h
+++ b/Kernel/Arch/aarch64/Processor.h
@@ -24,7 +24,7 @@ class PageDirectory;
 
 class Thread;
 class Processor;
-class TrapFrame;
+struct TrapFrame;
 
 // FIXME This needs to go behind some sort of platform abstraction
 //       it is used between Thread and Processor.