--- a/intl/locale/unix/moz.build
+++ b/intl/locale/unix/moz.build
@@ -34,12 +34,10 @@ LOCAL_INCLUDES += [
 
 
 # CODESET is not automatically defined on some older versions of Redhat.
 # Define _XOPEN_SOURCE so CODESET will get defined and thus allow
 # nl_langinfo(CODESET) to compile on these systems.
 if CONFIG['OS_ARCH'] == 'Linux':
     DEFINES['_XOPEN_SOURCE'] = 500
 
-DEFINES['OSTYPE'] = '"%s"' % CONFIG['OS_CONFIG']
-
 if CONFIG['GNU_CXX']:
     CXXFLAGS += ['-Wshadow']