diff --git a/src/resources.c b/src/resources.c
index b12fe26..d900944 100644
--- a/src/resources.c
+++ b/src/resources.c
@@ -71,7 +71,7 @@ HRESULT Rsrc_setup(void)
 
   Log(LDEBUG, "system resource length = %u", (UINT)(&_binary_sysresources_zip_size));
   zip_error_init(&errinfo);
-  syssource = zip_source_buffer_create(_binary_sysresources_zip_start, (zip_uint64_t)(&_binary_sysresources_zip_size),
+  syssource = zip_source_buffer_create(_binary_sysresources_zip_start, (UINT_PTR)(&_binary_sysresources_zip_size),
                                        0, &errinfo);
   if (!syssource)
   {