diff --git a/ChangeLog.txt b/ChangeLog.txt
index 9e85a7cbc7..465e82cc7c 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -10,6 +10,10 @@
      * Change, ! Fix, % Optimization, + Addition, - Removal, ; Comment
  */
 
+2016-03-10 12:52 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
+  * src/rtl/langcomp.prg
+    ! added missing de-AT lang mapping
+
 2016-03-08 22:10 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
   * src/rtl/isprint.c
     ! HB_ISPRINTER(), ISPRINTER() fix to open the port name with CREATE
diff --git a/src/rtl/langcomp.prg b/src/rtl/langcomp.prg
index cb8ec5a1c4..cc9aeb2c70 100644
--- a/src/rtl/langcomp.prg
+++ b/src/rtl/langcomp.prg
@@ -219,7 +219,7 @@ STATIC FUNCTION __LangStdToLangHb( cLangStd )
       CASE "da-dk"      ; EXIT
       CASE "da"         ; EXIT
 #endif
-      CASE "de-at"
+      CASE "de-at"      ; cLangHb := "de_at" ; EXIT
       CASE "de-ch"
       CASE "de-de"
       CASE "de-li"