diff --git a/src/mesa/drivers/x11/Makefile.am b/src/mesa/drivers/x11/Makefile.am
index 7a3513233f0..40b01dd1ef4 100644
--- a/src/mesa/drivers/x11/Makefile.am
+++ b/src/mesa/drivers/x11/Makefile.am
@@ -27,6 +27,7 @@ AM_CPPFLAGS = \
 	-I$(top_srcdir)/include \
 	-I$(top_srcdir)/src/mapi \
 	-I$(top_srcdir)/src/mesa \
+	-I$(top_srcdir)/src \
 	-I$(top_srcdir)/src/mesa/main \
 	$(X11_INCLUDES) \
 	$(DEFINES)