diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index d9ec40217a27..618b450e5a1d 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -23,6 +23,7 @@
  */
 #include <linux/types.h>
 #include <linux/sched.h>
+#include <linux/ptrace.h>
 
 #define COMPAT_USER_HZ		100
 #define COMPAT_UTS_MACHINE	"armv8l\0\0"