diff --git a/configure.ac b/configure.ac
index 5ba0a8236d..db9e7a5aa7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1029,7 +1029,7 @@ dnl prefer internal headers to already installed ones
 dnl also add builddir include for enumtypes and marshal
 dnl add ERROR_CFLAGS, but overridable
 GST_CFLAGS="-I\$(top_srcdir)/gst-libs -I\$(top_builddir)/gst-libs $GST_CFLAGS \$(GST_OPTION_CFLAGS)"
-GST_CXXFLAGS="-I\$(top_srcdir)/gst-libs -I\$(top_builddir)/gst-libs $GST_CXXFLAGS \$(GST_OPTION_CXXFLAGS)"
+GST_CXXFLAGS="-I\$(top_srcdir)/gst-libs -I\$(top_builddir)/gst-libs $GST_FLAGS \$(GST_OPTION_CXXFLAGS)"
 AC_SUBST(GST_CFLAGS)
 AC_SUBST(GST_CXXFLAGS)
 AC_SUBST(GST_LIBS)