diff --git a/src/MinedMap.cpp b/src/MinedMap.cpp
index 4855b6f..48c9335 100644
--- a/src/MinedMap.cpp
+++ b/src/MinedMap.cpp
@@ -206,8 +206,10 @@ static int64_t getModTime(const std::string &file) {
 		return INT64_MIN;
 	}
 
-#ifdef _WIN32
+#if defined(_WIN32)
 	return (int64_t)s.st_mtime * 1000000;
+#elif defined(__APPLE__) || defined(__NetBSD__)
+	return (int64_t)s.st_mtimespec.tv_sec * 1000000 + s.st_mtimespec.tv_nsec / 1000;
 #else
 	return (int64_t)s.st_mtim.tv_sec * 1000000 + s.st_mtim.tv_nsec / 1000;
 #endif