diff --git a/build/conf/nsis/strings.nsi b/build/conf/nsis/strings.nsi
index 2efe6fe71ad6..e9a9f30140aa 100644
--- a/build/conf/nsis/strings.nsi
+++ b/build/conf/nsis/strings.nsi
@@ -7,7 +7,7 @@
 !define PRODUCT_UNINST_ICON_FILE "idea_uninst.ico"
 !define PRODUCT_LOGO_FILE "logo.bmp"
 !define PRODUCT_HEADER_FILE "headerlogo.bmp"
-!define ASSOCIATION ".java,.groovy"
+!define ASSOCIATION ".java,.groovy,.kt"
 !define UNINSTALL_WEB_PAGE "https://www.jetbrains.com/idea/uninstall/?edition=IU-__VERSION_MAJOR__.__VERSION_MINOR__"
 
 ; if SHOULD_SET_DEFAULT_INSTDIR != 0 then default installation directory will be directory where highest-numbered IDEA build has been installed
diff --git a/build/conf/nsis/stringsCE.nsi b/build/conf/nsis/stringsCE.nsi
index b3239d1b30c5..98fe712d90bb 100644
--- a/build/conf/nsis/stringsCE.nsi
+++ b/build/conf/nsis/stringsCE.nsi
@@ -7,7 +7,7 @@
 !define PRODUCT_UNINST_ICON_FILE "idea_CEuninst.ico"
 !define PRODUCT_LOGO_FILE "logoCE.bmp"
 !define PRODUCT_HEADER_FILE "headerlogoCE.bmp"
-!define ASSOCIATION ".java,.groovy"
+!define ASSOCIATION ".java,.groovy,.kt"
 !define UNINSTALL_WEB_PAGE "https://www.jetbrains.com/idea/uninstall/?edition=IC-__VERSION_MAJOR__.__VERSION_MINOR__"
 
 ; if SHOULD_SET_DEFAULT_INSTDIR != 0 then default installation directory will be directory where highest-numbered IDEA build has been installed