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diff --git a/src/unittests/endian.cc b/src/unittests/endian.cc
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+/*
+ * The ManaPlus Client
+ * Copyright (C) 2013-2017 The ManaPlus Developers
+ *
+ * This file is part of The ManaPlus Client.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "unittests/unittests.h"
+
+#include "logger.h"
+
+#include "utils/delete2.h"
+
+PRAGMA48(GCC diagnostic push)
+PRAGMA48(GCC diagnostic ignored "-Wshadow")
+#include <SDL_endian.h>
+PRAGMA48(GCC diagnostic pop)
+
+#include "debug.h"
+
+#ifndef SDL_BIG_ENDIAN
+#error missing SDL_endian.h
+#endif // SDL_BYTEORDER
+
+namespace
+{
+ union ByteOrderData final
+ {
+ uint32_t dwordData;
+ uint8_t byteData[4];
+ } __attribute__((packed));
+} // namespace
+
+TEST_CASE("endian test", "")
+{
+ ByteOrderData data;
+ data.byteData[0] = 0x10;
+ data.byteData[1] = 0x20;
+ data.byteData[2] = 0x30;
+ data.byteData[3] = 0x40;
+ logger = new Logger();
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ REQUIRE(data.dwordData == 0x10203040);
+ logger->log("big endian detected");
+#else // SDL_BYTEORDER == SDL_BIG_ENDIAN
+
+ REQUIRE(data.dwordData == 0x40302010);
+ logger->log("little endian detected");
+#endif // SDL_BYTEORDER == SDL_BIG_ENDIAN
+
+ delete2(logger);
+}