diff --git a/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeTypes.kt b/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeTypes.kt
index 7d4d166cb15..89ba8eebf65 100644
--- a/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeTypes.kt
+++ b/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeTypes.kt
@@ -56,7 +56,9 @@ external fun CPointer<*>.getRawValue(): NativePtr
 
 internal fun CPointer<*>.cPointerToString() = "CPointer(raw=$rawValue)"
 
-public class Vector128VarOf<T : Vector128>(rawPtr: NativePtr) : CVariable(rawPtr)
+public class Vector128VarOf<T : Vector128>(rawPtr: NativePtr) : CVariable(rawPtr) {
+    companion object : Type(size = 16, align = 16)
+}
 
 public typealias Vector128Var = Vector128VarOf<Vector128>