diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 3d87fad..8976da3 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -1383,7 +1383,8 @@
 		*p-- = 0;
 
 	/* clear msb bits if any leftover in the last byte */
-	*p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);
+	if (cell->nbits % BITS_PER_BYTE)
+		*p &= GENMASK((cell->nbits % BITS_PER_BYTE) - 1, 0);
 }
 
 static int __nvmem_cell_read(struct nvmem_device *nvmem,