diff --git a/headers/private/servers/app/DisplayDriver.h b/headers/private/servers/app/DisplayDriver.h
index 397ec39bf1..7a522218e2 100644
--- a/headers/private/servers/app/DisplayDriver.h
+++ b/headers/private/servers/app/DisplayDriver.h
@@ -320,8 +320,8 @@ class DisplayDriver {
 												const DrawData *d) = 0;
 
 	virtual status_t			SetDPMSMode(const uint32 &state);
-	virtual uint32				DPMSMode() const;
-	virtual uint32				DPMSCapabilities() const;
+	virtual uint32				DPMSMode();
+	virtual uint32				DPMSCapabilities();
 	virtual status_t			GetDeviceInfo(accelerant_device_info *info) = 0;
 
 	virtual status_t			GetModeList(display_mode **mode_list,