diff --git a/development/scons/SConstruct b/development/scons/SConstruct
index c3923ea712..6c20fbacea 100644
--- a/development/scons/SConstruct
+++ b/development/scons/SConstruct
@@ -1101,7 +1101,7 @@ int count()
                 'Spell engine to use'
             ),
             # we need to know the byte order for unicode conversions
-            (sys.byteorder == 'big', 'WORDS_BIGENDIAN'
+            (sys.byteorder == 'big', 'WORDS_BIGENDIAN',
                 'Define to 1 if your processor stores words with the most significant byte first (like Motorola and SPARC, unlike Intel and VAX).'
             ),
         ],