diff --git a/src/flash/nor/kinetis.c b/src/flash/nor/kinetis.c
index bc39772dd..dc9208cf4 100644
--- a/src/flash/nor/kinetis.c
+++ b/src/flash/nor/kinetis.c
@@ -731,7 +731,7 @@ static int kinetis_write(struct flash_bank *bank, uint8_t *buffer,
 			}
 			LOG_INFO("odd number of bytes to write (%" PRIu32 "), extending to %" PRIu32 " "
 				"and padding with 0xff", old_count, count);
-			memset(buffer, 0xff, count);
+			memset(new_buffer, 0xff, count);
 			buffer = memcpy(new_buffer, buffer, old_count);
 		}