diff --git a/configure.in b/configure.in
index c54a477..4f3eef4 100644
--- a/configure.in
+++ b/configure.in
@@ -128,6 +128,10 @@ PKG_CHECK_MODULES([QT], [Qt5Core Qt5Gui Qt5Widgets Qt5Network],
         have_qt=1],
        [have_qt=0])])
 AM_CONDITIONAL(HAVE_QT, test "$have_qt" = "1")
+if test "$have_qt" = "1"; then
+  test -n "$UIC" -a -n "$MOC" -a -n "$RCC" -a -n "$LUPDATE" -a -n "$LRELEASE"
+  which "$UIC" "$MOC" "$RCC" "$LUPDATE" "$LRELEASE"
+fi
 AC_SUBST(UIC)
 AC_SUBST(MOC)
 AC_SUBST(RCC)