diff --git a/browser/locales/en-US/installer/custom.properties b/browser/locales/en-US/installer/custom.properties
index 56e8cd1fcb6..88d782a3d55 100755
--- a/browser/locales/en-US/installer/custom.properties
+++ b/browser/locales/en-US/installer/custom.properties
@@ -72,6 +72,7 @@ ICONS_STARTMENU=In my &Start Menu Programs folder
 ICONS_QUICKLAUNCH=In my &Quick Launch bar
 WARN_WRITE_ACCESS=You don't have access to write to the installation directory.\n\nClick OK to select a different directory.
 WARN_DISK_SPACE=You don't have sufficient disk space to install to this location.\n\nClick OK to select a different location.
+WARN_UNSUPPORTED_MSG=Sorry, ${BrandShortName} can't be installed. This version of ${BrandShortName} requires ${MinUnsupportedVer} or newer.
 
 STATUS_INSTALL_APP=Installing ${BrandShortName}...
 STATUS_INSTALL_LANG=Installing Language Files (${AB_CD})...