diff --git a/configure.ac b/configure.ac
index 2c11703cb3ff..302a006bbf75 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13444,8 +13444,6 @@ then
         fi
     fi
 
-    qt5_incdirs="`$QMAKE5 -query QT_INSTALL_HEADERS` $qt5_incdirs"
-    qt5_libdirs="`$QMAKE5 -query QT_INSTALL_LIBS` $qt5_libdirs"
     qt5_platformsdir="`$QMAKE5 -query QT_INSTALL_PLUGINS`/platforms"
     QT5_PLATFORMS_SRCDIR="$qt5_platformsdir"
 
@@ -13585,8 +13583,6 @@ then
         AC_MSG_NOTICE([Detected Qt6 version: $qmake6_test_ver])
     fi
 
-    qt6_incdirs="`$QMAKE6 -query QT_INSTALL_HEADERS` $qt6_incdirs"
-    qt6_libdirs="`$QMAKE6 -query QT_INSTALL_LIBS` $qt6_libdirs"
     qt6_platformsdir="`$QMAKE6 -query QT_INSTALL_PLUGINS`/platforms"
     QT6_PLATFORMS_SRCDIR="$qt6_platformsdir"