diff --git a/drivers/staging/gasket/gasket_core.h b/drivers/staging/gasket/gasket_core.h
index 203b9a31377bf3c9131bb995ccc35924dae7f51e..5d6535a0f2542ffd4fc7d3e32f81484a537f5318 100644
--- a/drivers/staging/gasket/gasket_core.h
+++ b/drivers/staging/gasket/gasket_core.h
@@ -683,7 +683,7 @@ static inline void gasket_read_modify_write_64(
 	u64 mask, tmp;
 
 	tmp = gasket_dev_read_64(dev, bar, location);
-	mask = ((1 << mask_width) - 1) << mask_shift;
+	mask = ((1ULL << mask_width) - 1) << mask_shift;
 	tmp = (tmp & ~mask) | (value << mask_shift);
 	gasket_dev_write_64(dev, tmp, bar, location);
 }