diff --git a/src/egl/drivers/glx/Makefile.am b/src/egl/drivers/glx/Makefile.am
index 6db95b40cd4..5dd52285dc0 100644
--- a/src/egl/drivers/glx/Makefile.am
+++ b/src/egl/drivers/glx/Makefile.am
@@ -23,7 +23,7 @@ AM_CFLAGS = \
 	-I$(top_srcdir)/include \
 	-I$(top_srcdir)/src/egl/main \
 	$(VISIBILITY_CFLAGS) \
-	$(X11_CFLAGS) \
+	$(X11_INCLUDES) \
 	$(DEFINES)
 
 noinst_LTLIBRARIES = libegl_glx.la