diff --git a/development/Win32/packaging/AltInstaller/LanguageSettings.nsh b/development/Win32/packaging/AltInstaller/LanguageSettings.nsh
index efd7af35fa..d2496a10e4 100644
--- a/development/Win32/packaging/AltInstaller/LanguageSettings.nsh
+++ b/development/Win32/packaging/AltInstaller/LanguageSettings.nsh
@@ -518,6 +518,11 @@
 
 !macro GetLangCode LangCde Name LangEnc
 
+  ${if} ${Name} == "Català"
+   StrCpy ${LangCde} "ca_ES"
+   StrCpy ${LangEnc} "cp-1252"
+  ${endif}
+
   ${if} ${Name} == "Ceština"
    StrCpy ${LangCde} "cs_CZ"
    StrCpy ${LangEnc} "cp-1250"
diff --git a/development/Win32/packaging/AltInstaller/io_ui_language.ini b/development/Win32/packaging/AltInstaller/io_ui_language.ini
index e2abe8aa2c..332179cd6a 100644
--- a/development/Win32/packaging/AltInstaller/io_ui_language.ini
+++ b/development/Win32/packaging/AltInstaller/io_ui_language.ini
@@ -11,7 +11,7 @@ Text=" Available Languages "
 
 [Field 2]
 Type=Droplist
-ListItems=Ceština|Chinese (China)|Chinese (Taiwan)|Dansk|Deutsch|English|Español|Euskara|Français|Galego|Hebrew|Italiano|Japanese|Korean|Magyar|Nederlands|Norsk|Nynorsk|Polski|Português|Româna|Russian|Slovenskı|Slovenšcina|Suomi|Türkçe
+ListItems=Català|Ceština|Chinese (China)|Chinese (Taiwan)|Dansk|Deutsch|English|Español|Euskara|Français|Galego|Hebrew|Italiano|Japanese|Korean|Magyar|Nederlands|Norsk|Nynorsk|Polski|Português|Româna|Russian|Slovenskı|Slovenšcina|Suomi|Türkçe
 Left=20
 Right=130
 Top=15