diff --git a/intl/locale/unix/moz.build b/intl/locale/unix/moz.build
index 4e04bbe73d4a..a172f07a653a 100644
--- a/intl/locale/unix/moz.build
+++ b/intl/locale/unix/moz.build
@@ -39,7 +39,5 @@ LOCAL_INCLUDES += [
 if CONFIG['OS_ARCH'] == 'Linux':
     DEFINES['_XOPEN_SOURCE'] = 500
 
-DEFINES['OSTYPE'] = '"%s"' % CONFIG['OS_CONFIG']
-
 if CONFIG['GNU_CXX']:
     CXXFLAGS += ['-Wshadow']