diff --git a/test/test_strerror.cpp b/test/test_strerror.cpp
index 6cee02a5..d5aa63f2 100644
--- a/test/test_strerror.cpp
+++ b/test/test_strerror.cpp
@@ -72,7 +72,7 @@ mmk_mock_define(strerror_s_mock, errno_t, char *, rsize_t, errno_t);
 errno_t mocked_windows_strerror(char * buf, rsize_t bufsz, errno_t errnum)
 {
   (void) errnum;
-  strncpy_s(buf, (size_t) bufsz, expected_error_msg, (size_t) bufsz);
+  strncpy_s(buf, static_cast<size_t>(bufsz), expected_error_msg, static_cast<size_t>(bufsz));
   return errnum;
 }