diff --git a/hw/xfree86/ddc/xf86DDC.h b/hw/xfree86/ddc/xf86DDC.h
index 3e2644749..664bcbf6b 100644
--- a/hw/xfree86/ddc/xf86DDC.h
+++ b/hw/xfree86/ddc/xf86DDC.h
@@ -42,9 +42,6 @@ extern _X_EXPORT xf86MonPtr xf86InterpretEEDID(int screenIndex, Uchar * block);
 
 extern _X_EXPORT Bool xf86SetDDCproperties(ScrnInfoPtr pScreen, xf86MonPtr DDC);
 
-extern _X_EXPORT Bool
-gtf_supported(xf86MonPtr mon);
-
 extern _X_EXPORT DisplayModePtr
 FindDMTMode(int hsize, int vsize, int refresh, Bool rb);
 
diff --git a/hw/xfree86/ddc/xf86DDC_priv.h b/hw/xfree86/ddc/xf86DDC_priv.h
index b46c2cdb1..addc07aea 100644
--- a/hw/xfree86/ddc/xf86DDC_priv.h
+++ b/hw/xfree86/ddc/xf86DDC_priv.h
@@ -52,4 +52,7 @@ struct cea_data_block *xf86MonitorFindHDMIBlock(xf86MonPtr mon);
 
 void xf86EdidMonitorSet(int scrnIndex, MonPtr Monitor, xf86MonPtr DDC);
 
+/* only exported for modesetting */ _X_EXPORT
+Bool gtf_supported(xf86MonPtr mon);
+
 #endif /* _XSERVER_XF86_DDC_PRIV_H */
diff --git a/hw/xfree86/drivers/modesetting/drmmode_display.c b/hw/xfree86/drivers/modesetting/drmmode_display.c
index cf4269403..7da0e50ff 100644
--- a/hw/xfree86/drivers/modesetting/drmmode_display.c
+++ b/hw/xfree86/drivers/modesetting/drmmode_display.c
@@ -40,7 +40,7 @@
 #include "mi.h"
 #include "micmap.h"
 #include "xf86cmap.h"
-#include "xf86DDC.h"
+#include "xf86DDC_priv.h"
 #include <drm_fourcc.h>
 #include <drm_mode.h>