diff --git a/config.tests/unix/endian.test b/config.tests/unix/endian.test
index 2985fd8241b..6c5c3118883 100755
--- a/config.tests/unix/endian.test
+++ b/config.tests/unix/endian.test
@@ -4,13 +4,14 @@ QMKSPEC=$1
 VERBOSE=$2
 SRCDIR=$3
 OUTDIR=$4
+QMFLAGS=$5
 
 # debuggery
 [ "$VERBOSE" = "yes" ] && echo "Determining machine byte-order... ($*)"
 
 # build and run a test program
 test -d "$OUTDIR/config.tests/unix/endian" || mkdir -p "$OUTDIR/config.tests/unix/endian"
-"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" "QMAKE_LFLAGS+=$SYSROOT_FLAG" "$SRCDIR/config.tests/unix/endian/endiantest.pro" -o "$OUTDIR/config.tests/unix/endian/Makefile" >/dev/null 2>&1
+"$OUTDIR/bin/qmake" -nocache -spec "$QMKSPEC" "QT_BUILD_TREE=$OUTDIR" $QMFLAGS "$SRCDIR/config.tests/unix/endian/endiantest.pro" -o "$OUTDIR/config.tests/unix/endian/Makefile" >/dev/null 2>&1
 cd "$OUTDIR/config.tests/unix/endian"
 
 
diff --git a/configure b/configure
index d497c2f77c6..bfbb5c7768d 100755
--- a/configure
+++ b/configure
@@ -5979,7 +5979,7 @@ if [ "$CFG_ENDIAN" = "auto" ]; then
     elif [ "$PLATFORM_MAC" = "yes" ]; then
         true #leave as auto
     else
-        "$unixtests/endian.test" "$XQMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath"
+        "$unixtests/endian.test" "$XQMAKESPEC" $OPT_VERBOSE "$relpath" "$outpath" "QMAKE_LFLAGS+=$SYSROOT_FLAG"
 	F="$?"
         if [ "$F" -eq 0 ]; then
             CFG_ENDIAN="Q_LITTLE_ENDIAN"