diff --git a/sys/arm64/arm64/identcpu.c b/sys/arm64/arm64/identcpu.c
--- a/sys/arm64/arm64/identcpu.c
+++ b/sys/arm64/arm64/identcpu.c
@@ -1161,7 +1161,7 @@
 /* ID_AA64MMFR0_EL1 */
 static const struct mrs_field_value id_aa64mmfr0_ecv[] = {
 	MRS_FIELD_VALUE_NONE_IMPL(ID_AA64MMFR0, ECV, NONE, IMPL),
-	MRS_FIELD_VALUE(ID_AA64MMFR0_ECV_CNTHCTL, "ECV+CNTHCTL"),
+	MRS_FIELD_VALUE(ID_AA64MMFR0_ECV_POFF, "ECV POFF"),
 	MRS_FIELD_VALUE_END,
 };
 
diff --git a/sys/arm64/include/armreg.h b/sys/arm64/include/armreg.h
--- a/sys/arm64/include/armreg.h
+++ b/sys/arm64/include/armreg.h
@@ -1287,7 +1287,7 @@
 #define	ID_AA64MMFR0_ECV_VAL(x)		((x) & ID_AA64MMFR0_ECV_MASK)
 #define	 ID_AA64MMFR0_ECV_NONE		(UL(0x0) << ID_AA64MMFR0_ECV_SHIFT)
 #define	 ID_AA64MMFR0_ECV_IMPL		(UL(0x1) << ID_AA64MMFR0_ECV_SHIFT)
-#define	 ID_AA64MMFR0_ECV_CNTHCTL	(UL(0x2) << ID_AA64MMFR0_ECV_SHIFT)
+#define	 ID_AA64MMFR0_ECV_POFF		(UL(0x2) << ID_AA64MMFR0_ECV_SHIFT)
 
 /* ID_AA64MMFR1_EL1 */
 #define	ID_AA64MMFR1_EL1_REG		MRS_REG_ALT_NAME(ID_AA64MMFR1_EL1)