diff --git a/src/runtime/arch_arm64.go b/src/runtime/arch_arm64.go
index 373be884..a481fb1a 100644
--- a/src/runtime/arch_arm64.go
+++ b/src/runtime/arch_arm64.go
@@ -9,7 +9,7 @@ const deferExtraRegs = 0
 
 // Align on word boundary.
 func align(ptr uintptr) uintptr {
-	return (ptr + 7) &^ 7
+	return (ptr + 15) &^ 15
 }
 
 func getCurrentStackPointer() uintptr {