diff --git a/src/add-ons/kernel/drivers/graphics/nvidia/driver.c b/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
index d92be2d528..1758295d0e 100644
--- a/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
+++ b/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
@@ -4,7 +4,7 @@
 
 	Other authors:
 	Mark Watson;
-	Rudolf Cornelissen 3/2002-11/2005.
+	Rudolf Cornelissen 3/2002-1/2006.
 */
 
 /* standard kernel driver stuff */
@@ -984,6 +984,9 @@ static status_t open_hook (const char* name, uint32 flags, void** cookie) {
 	si->device = di->pcii.device;
 	si->function = di->pcii.function;
 
+	/* ensure that the accelerant's INIT_ACCELERANT function can be executed */
+	si->accelerant_in_use = false;
+
 	/* note the amount of system RAM the system BIOS assigned to the card if applicable:
 	 * unified memory architecture (UMA) */
 	switch ((((uint32)(si->device_id)) << 16) | si->vendor_id)