diff --git a/headers/private/graphics/matrox/DriverInterface.h b/headers/private/graphics/matrox/DriverInterface.h
index f978fc6d36..89647ac792 100644
--- a/headers/private/graphics/matrox/DriverInterface.h
+++ b/headers/private/graphics/matrox/DriverInterface.h
@@ -94,9 +94,9 @@ typedef struct settings {  // apsed, see comments in mga.settings
 	bool   greensync;
 } settings;
 
-/*shared info*/
+/* shared info */
 typedef struct {
-  /*a few ID things*/
+  /* a few ID things */
 	uint16	vendor_id;	/* PCI vendor ID, from pci_info */
 	uint16	device_id;	/* PCI device ID, from pci_info */
 	uint8	revision;	/* PCI device revsion, from pci_info */
@@ -104,6 +104,9 @@ typedef struct {
 	uint8	device;		/* PCI device number on bus, from pci_info */
 	uint8	function;	/* PCI function number in device, from pci_info */
 
+  /* used to return status for INIT_ACCELERANT and CLONE_ACCELERANT */
+	bool	accelerant_in_use;
+
   /* bug workaround for 4.5.0 */
 	uint32 use_clone_bugfix;	/*for 4.5.0, cloning of physical memory does not work*/
 	uint32 * clone_bugfix_regs;