diff --git a/src/lang/italian.txt b/src/lang/italian.txt
--- a/src/lang/italian.txt
+++ b/src/lang/italian.txt
@@ -280,6 +280,7 @@ STR_OSNAME_BEOS                         
 STR_OSNAME_MORPHOS                                              :MorphOS
 STR_OSNAME_AMIGAOS                                              :AmigaOS
 STR_OSNAME_OS2                                                  :OS/2
+STR_OSNAME_SUNOS                                                :SunOS
 
 STR_013B_OWNED_BY                                               :{WHITE}...posseduto da {STRING}
 STR_013C_CARGO                                                  :{BLACK}Carico