diff --git a/cmake/QtProcessConfigureArgs.cmake b/cmake/QtProcessConfigureArgs.cmake
index 6cb17c4e7d..90371ae419 100644
--- a/cmake/QtProcessConfigureArgs.cmake
+++ b/cmake/QtProcessConfigureArgs.cmake
@@ -160,7 +160,6 @@ defstub(qt_set01)
 unset(commandline_known_options)
 unset(commandline_custom_handlers)
 set(commandline_nr_of_prefixes 0)
-set(commandline_nr_of_assignments 0)
 
 macro(qt_commandline_subconfig subconfig)
     list(APPEND commandline_subconfigs "${subconfig}")
@@ -198,13 +197,6 @@ function(qt_commandline_prefix arg var)
     set(commandline_nr_of_prefixes ${n} PARENT_SCOPE)
 endfunction()
 
-function(qt_commandline_assignment var internal_var)
-    set(idx ${commandline_nr_of_assignments})
-    set(commandline_assignment_${idx} "${var}" "${internal_var}" PARENT_SCOPE)
-    math(EXPR n "${commandline_nr_of_assignments} + 1")
-    set(commandline_nr_of_assignments ${n} PARENT_SCOPE)
-endfunction()
-
 # Check the following variable in configure.cmake files to guard code that is not covered by the
 # stub functions above.
 set(QT_CONFIGURE_RUNNING ON)
@@ -569,27 +561,6 @@ while(1)
         continue()
     endif()
 
-    if(arg MATCHES "^([A-Z0-9_]+)=(.*)")
-        set(lhs "${CMAKE_MATCH_1}")
-        set(rhs "${CMAKE_MATCH_2}")
-        math(EXPR n "${commandline_nr_of_assignments} - 1")
-        foreach(i RANGE ${n})
-            list(GET commandline_assignment_${i} 0 var)
-            list(GET commandline_assignment_${i} 1 internal_var)
-            if(lhs STREQUAL var)
-                set(handled TRUE)
-                qtConfCommandlineSetInput("${internal_var}" "${rhs}")
-                break()
-            endif()
-        endforeach()
-        if(NOT handled)
-            message(FATAL_ERROR "Assigning unknown variable '${lhs}' on command line.")
-        endif()
-    endif()
-    if(handled)
-        continue()
-    endif()
-
     # parse out opt and val
     set(nextok FALSE)
     if(arg MATCHES "^--?enable-(.*)")
diff --git a/util/cmake/configurejson2cmake.py b/util/cmake/configurejson2cmake.py
index 3be7118080..d177ba3fe4 100755
--- a/util/cmake/configurejson2cmake.py
+++ b/util/cmake/configurejson2cmake.py
@@ -1413,11 +1413,6 @@ def parseCommandLinePrefixes(ctx, data, cm_fh):
         cm_fh.write(f"qt_commandline_prefix({key} {data[key]})\n")
 
 
-def parseCommandLineAssignments(ctx, data, cm_fh):
-    for key in data:
-        cm_fh.write(f"qt_commandline_assignment({key} {data[key]})\n")
-
-
 def processCommandLine(ctx, data, cm_fh):
     print("  commandline:")
 
@@ -1439,8 +1434,7 @@ def processCommandLine(ctx, data, cm_fh):
         print("    prefix:")
         parseCommandLinePrefixes(ctx, commandLine["prefix"], cm_fh)
     if "assignments" in commandLine:
-        print("    assignments:")
-        parseCommandLineAssignments(ctx, commandLine["assignments"], cm_fh)
+        print("    assignments are ignored")
 
 
 def processInputs(ctx, data, cm_fh):