diff --git a/src/add-ons/kernel/drivers/graphics/nvidia/driver.c b/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
index 39ae38a43a..6b6c2276dc 100644
--- a/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
+++ b/src/add-ons/kernel/drivers/graphics/nvidia/driver.c
@@ -696,7 +696,7 @@ static status_t map_device(device_info *di)
 			(void *) di->pcii.u.h0.base_registers_pci[frame_buffer],
 			di->pcii.u.h0.base_register_sizes[frame_buffer],
 			B_ANY_KERNEL_BLOCK_ADDRESS,
-			B_READ_AREA + B_WRITE_AREA,
+			B_READ_AREA | B_WRITE_AREA,
 			&(si->framebuffer));
 	}