diff --git a/src/internal/cpu/cpu_arm64.go b/src/internal/cpu/cpu_arm64.go
index 078a6c3b80a..d3c6cc83051 100644
--- a/src/internal/cpu/cpu_arm64.go
+++ b/src/internal/cpu/cpu_arm64.go
@@ -4,4 +4,4 @@
 
 package cpu
 
-const CacheLineSize = 32
+const CacheLineSize = 64
diff --git a/src/runtime/internal/sys/arch_arm64.go b/src/runtime/internal/sys/arch_arm64.go
index 2d57ddae191..df8fb1e5fbb 100644
--- a/src/runtime/internal/sys/arch_arm64.go
+++ b/src/runtime/internal/sys/arch_arm64.go
@@ -7,7 +7,7 @@ package sys
 const (
 	ArchFamily          = ARM64
 	BigEndian           = 0
-	CacheLineSize       = 32
+	CacheLineSize       = 64
 	DefaultPhysPageSize = 65536
 	PCQuantum           = 4
 	Int64Align          = 8