diff --git a/CUETools.Codecs.MACLib/MACLibDll.cs b/CUETools.Codecs.MACLib/MACLibDll.cs
index ac847d40..e80d83c8 100644
--- a/CUETools.Codecs.MACLib/MACLibDll.cs
+++ b/CUETools.Codecs.MACLib/MACLibDll.cs
@@ -36,7 +36,7 @@ internal static extern IntPtr c_APECIO_Create(
         internal static extern void c_APECompress_Destroy(IntPtr hAPECompress);
 
         [DllImport(DllName, CallingConvention = DllCallingConvention)]
-        internal static extern int c_APECompress_Finish(IntPtr hAPECompress, char* pTerminatingData, int nTerminatingBytes, int nWAVTerminatingBytes);
+        internal static extern int c_APECompress_Finish(IntPtr hAPECompress, byte* pTerminatingData, long nTerminatingBytes, long nWAVTerminatingBytes);
 
         [DllImport(DllName, CallingConvention = DllCallingConvention)]
         internal static extern long c_APECompress_AddData(IntPtr hAPECompress, byte* pData, int nBytes);