diff --git a/sc2/src/endian_uqm.h b/sc2/src/endian_uqm.h
index 5f3910e3e..759008bc7 100644
--- a/sc2/src/endian_uqm.h
+++ b/sc2/src/endian_uqm.h
@@ -25,6 +25,23 @@
 #include "config.h"
 #include "types.h"
 
+#if defined (__APPLE__) && defined (__GNUC__)
+// When using the MacOS gcc compiler to build universal binaries,
+// each file will be compiled once for each platform.
+// This means that checking endianness beforehand from build.sh will not do,
+// but fortunately, gcc defines __BIG_ENDIAN__ or __LITTLE_ENDIAN__ on
+// this platform.
+#	if defined(__BIG_ENDIAN__)
+#		undef WORDS_BIGENDIAN
+#		define WORDS_BIGENDIAN
+#	elif defined(__LITTLE_ENDIAN__)
+#		undef WORDS_BIGENDIAN
+#	else
+		// Neither __BIG_ENDIAN__ nor __LITTLE_ENDIAN__ is defined.
+		// Fallback to using the build.sh defined value.
+#	endif
+#endif  /* __APPLE__ */
+
 #if defined(_MSC_VER) || defined(__BORLANDC__) || \
     defined(__DMC__) || defined(__SC__) || \
     defined(__WATCOMC__) || defined(__LCC__)
diff --git a/sc2/src/sc2code/libs/network/bytesex.h b/sc2/src/sc2code/libs/network/bytesex.h
index 34a678260..99b644db7 100644
--- a/sc2/src/sc2code/libs/network/bytesex.h
+++ b/sc2/src/sc2code/libs/network/bytesex.h
@@ -27,7 +27,7 @@
 
 #include "port.h"
 		// for inline
-#include "config.h"
+#include "endian_uqm.h"
 		// for WORDS_BIGENDIAN
 #include "types.h"
 
diff --git a/sc2/src/sc2code/libs/sound/openal/audiodrv_openal.h b/sc2/src/sc2code/libs/sound/openal/audiodrv_openal.h
index 01a212659..1635eb276 100644
--- a/sc2/src/sc2code/libs/sound/openal/audiodrv_openal.h
+++ b/sc2/src/sc2code/libs/sound/openal/audiodrv_openal.h
@@ -23,6 +23,7 @@
 #include "config.h"
 #include "libs/sound/sound.h"
 #include "options.h"
+#include "endian_uqm.h"
 
 #if defined (__APPLE__)
 #	include <OpenAL/al.h>