Index: scripts/extract-messages.sh
===================================================================
--- scripts/extract-messages.sh
+++ scripts/extract-messages.sh
@@ -40,7 +40,14 @@
 
    if test -f Messages.sh; then
        # Note: Messages.sh is supposed to get the translators' placeholder by rc.cpp
-       podir=$podir srcdir=. XGETTEXT_PROGRAM="${XGETTEXT:-xgettext}" XGETTEXT_QT="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS_QT" XGETTEXT_WWW="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS_WWW" XGETTEXT="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS" bash Messages.sh
+       podir=$podir srcdir=. \
+       XGETTEXT_PROGRAM="${XGETTEXT:-xgettext}" \
+       XGETTEXT_QT="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS_QT" \
+       XGETTEXT_WWW="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS_WWW" \
+       XGETTEXT="${XGETTEXT:-xgettext} $XGETTEXT_FLAGS" \
+       XGETTEXT_KDE4=$XGETTEXT \
+       XGETTEXT_KF5="true" \
+       bash Messages.sh
    fi
    exit_code=$?
    if test "$exit_code" -ne 0; then