diff --git a/sys/arm64/include/armreg.h b/sys/arm64/include/armreg.h
index 034504727b3..3ae2f24c2a5 100644
--- a/sys/arm64/include/armreg.h
+++ b/sys/arm64/include/armreg.h
@@ -2127,7 +2127,7 @@
 #define	TCR_TBI1_SHIFT		38
 #define	TCR_TBI1		(1UL << TCR_TBI1_SHIFT)
 #define	TCR_TBI0_SHIFT		37
-#define	TCR_TBI0		(1U << TCR_TBI0_SHIFT)
+#define	TCR_TBI0		(1UL << TCR_TBI0_SHIFT)
 #define	TCR_ASID_SHIFT		36
 #define	TCR_ASID_WIDTH		1
 #define	TCR_ASID_16		(1UL << TCR_ASID_SHIFT)