diff --git a/sys/arm64/include/reg.h b/sys/arm64/include/reg.h
index d7c3354bfd2f..bb151af55ba6 100644
--- a/sys/arm64/include/reg.h
+++ b/sys/arm64/include/reg.h
@@ -33,12 +33,14 @@
 #ifndef	_MACHINE_REG_H_
 #define	_MACHINE_REG_H_
 
+#include <sys/_types.h>
+
 struct reg {
-	uint64_t x[30];
-	uint64_t lr;
-	uint64_t sp;
-	uint64_t elr;
-	uint32_t spsr;
+	__uint64_t x[30];
+	__uint64_t lr;
+	__uint64_t sp;
+	__uint64_t elr;
+	__uint32_t spsr;
 };
 
 struct reg32 {
@@ -51,8 +53,8 @@ struct reg32 {
 
 struct fpreg {
 	__uint128_t	fp_q[32];
-	uint32_t	fp_sr;
-	uint32_t	fp_cr;
+	__uint32_t	fp_sr;
+	__uint32_t	fp_cr;
 };
 
 struct fpreg32 {
@@ -60,20 +62,20 @@ struct fpreg32 {
 };
 
 struct dbreg {
-	uint8_t		db_debug_ver;
-	uint8_t		db_nbkpts;
-	uint8_t		db_nwtpts;
-	uint8_t		db_pad[5];
+	__uint8_t	db_debug_ver;
+	__uint8_t	db_nbkpts;
+	__uint8_t	db_nwtpts;
+	__uint8_t	db_pad[5];
 
 	struct {
-		uint64_t dbr_addr;
-		uint32_t dbr_ctrl;
-		uint32_t dbr_pad;
+		__uint64_t dbr_addr;
+		__uint32_t dbr_ctrl;
+		__uint32_t dbr_pad;
 	} db_breakregs[16];
 	struct {
-		uint64_t dbw_addr;
-		uint32_t dbw_ctrl;
-		uint32_t dbw_pad;
+		__uint64_t dbw_addr;
+		__uint32_t dbw_ctrl;
+		__uint32_t dbw_pad;
 	} db_watchregs[16];
 };