diff --git a/lang/brazilian_portuguese.txt b/lang/brazilian_portuguese.txt
--- a/lang/brazilian_portuguese.txt
+++ b/lang/brazilian_portuguese.txt
@@ -276,7 +276,7 @@ STR_0135_OSX                            
 STR_OSNAME_BEOS                                                 :BeOS
 STR_OSNAME_MORPHOS                                              :MorphOS
 STR_OSNAME_AMIGAOS                                              :AmigaOS
-STR_OSNAME_OS2                                                  :SO/2
+STR_OSNAME_OS2                                                  :OS/2
 
 STR_0139_IMPERIAL_MILES                                         :Imperial (milhas)
 STR_013A_METRIC_KILOMETERS                                      :Métrico (quilômetros)