Fix moc detection

diff --git a/configure.ac b/configure.ac
index 649890c2d2a0ea1210b00b904963d259d55af87a..111c7f8ff08042f50c8ab81fc796fa103502ed27 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -3890,10 +3890,10 @@ AS_IF([test "${enable_qt4}" != "no"], [
     ALIASES="${ALIASES} qvlc"
 
     AC_LANG_PUSH([C++])
-    CPPFLAGS_save="${CXXFLAGS}"
+    CPPFLAGS_save="${CPPFLAGS}"
 
     AC_MSG_CHECKING([whether Qt uses X11])
-    CPPFLAGS="${CXXFLAGS} ${QT4_CFLAGS}"
+    CPPFLAGS="${CPPFLAGS} ${QT4_CFLAGS}"
     AC_PREPROC_IFELSE([
 #include <QWidget>
 #if !defined (Q_WS_X11)