diff --git a/companion/src/CMakeLists.txt b/companion/src/CMakeLists.txt
index 24ba5dec7..5f5758186 100644
--- a/companion/src/CMakeLists.txt
+++ b/companion/src/CMakeLists.txt
@@ -123,7 +123,7 @@ configure_file(${COMPANION_SRC_DIRECTORY}/simulator.desktop.in ${CMAKE_CURRENT_B
 ### Generate .qm files and assemble resource (qrc) file.
 
 # available Companion translations (src/translations/*.ts)
-set(LANGUAGES cs de en es fi fr it pl sv zh_CN)
+set(LANGUAGES cs de en es fi fr it pl sv zh_CN ja)
 foreach(language ${LANGUAGES})
   list(APPEND companion_TS translations/companion_${language}.ts)
 endforeach(language)