diff --git a/configure b/configure
index b76f22a43f3..1d23b8eb406 100755
--- a/configure
+++ b/configure
@@ -920,6 +920,12 @@ else
 fi
 }
 
+printQmakeBuildErrorAndExit()
+{
+    echo >&2 "ERROR: You cannot configure Qt 6 with qmake anymore. Please configure with -cmake instead."
+    exit 1
+}
+
 checkTopLevelBuild "$@"
 parseCommandline "$@"
 handleHelp
@@ -945,6 +951,7 @@ if [ "$BUILD_WITH_CMAKE" = "yes" ]; then
 
     cmake "-DOPTFILE=$optfilename" $top_level_arg -P "$relpath/cmake/QtProcessConfigureArgs.cmake"
 else
+    printQmakeBuildErrorAndExit
     findPerl
     findAwk
     findMake
diff --git a/configure.bat b/configure.bat
index 171074bc689..ca106486a6d 100644
--- a/configure.bat
+++ b/configure.bat
@@ -163,6 +163,9 @@ goto doneargs
 
 if "%CMAKE%" == "true" goto cmake
 
+echo ERROR: You cannot configure Qt 6 with qmake anymore. Please configure with -cmake instead. >&2
+exit /b 1
+
 rem Find various executables
 for %%C in (clang-cl.exe clang.exe cl.exe icl.exe g++.exe perl.exe jom.exe) do set %%C=%%~$PATH:C