diff --git a/sys/arm64/include/pcpu.h b/sys/arm64/include/pcpu.h
index 286a40e7de3..d04f975350d 100644
--- a/sys/arm64/include/pcpu.h
+++ b/sys/arm64/include/pcpu.h
@@ -55,7 +55,6 @@ struct debug_monitor_state;
 
 #ifdef _KERNEL
 
-struct pcb;
 struct pcpu;
 
 static inline struct pcpu *