diff --git a/qt_cmdline.cmake b/qt_cmdline.cmake
index 14df26e0a26..fdf22561e7b 100644
--- a/qt_cmdline.cmake
+++ b/qt_cmdline.cmake
@@ -138,29 +138,10 @@ function(qt_commandline_cxxstd arg val nextok)
         qtConfAddError("Missing argument to command line parameter '${arg}'.")
         return()
     endif()
-    if(val MATCHES "(c\\+\\+)?11")
-        qtConfCommandlineSetInput(c++14 no)
-        qtConfCommandlineSetInput(c++17 no)
-        qtConfCommandlineSetInput(c++20 no)
-        qtConfCommandlineSetInput(c++2b no)
-    elseif(val MATCHES "(c\\+\\+)?(14|1y)")
-        qtConfCommandlineSetInput(c++14 yes)
-        qtConfCommandlineSetInput(c++17 no)
-        qtConfCommandlineSetInput(c++20 no)
-        qtConfCommandlineSetInput(c++2b no)
-    elseif(val MATCHES "(c\\+\\+)?(17|1z)")
-        qtConfCommandlineSetInput(c++14 yes)
-        qtConfCommandlineSetInput(c++17 yes)
-        qtConfCommandlineSetInput(c++20 no)
-        qtConfCommandlineSetInput(c++2b no)
-    elseif(val MATCHES "(c\\+\\+)?(20|2a)")
-        qtConfCommandlineSetInput(c++14 yes)
-        qtConfCommandlineSetInput(c++17 yes)
+    if(val MATCHES "(c\\+\\+)?(20|2a)")
         qtConfCommandlineSetInput(c++20 yes)
         qtConfCommandlineSetInput(c++2b no)
     elseif(val MATCHES "(c\\+\\+)?(2b)")
-        qtConfCommandlineSetInput(c++14 yes)
-        qtConfCommandlineSetInput(c++17 yes)
         qtConfCommandlineSetInput(c++20 yes)
         qtConfCommandlineSetInput(c++2b yes)
     else()