diff --git a/flash.h b/flash.h
index 2c2839f..24861ba 100644
--- a/flash.h
+++ b/flash.h
@@ -85,6 +85,7 @@
 	write_gran_1bit,	/* Each bit can be cleared individually. */
 	write_gran_1byte,	/* A byte can be written once. Further writes to an already written byte cause
 				 * its contents to be either undefined or to stay unchanged. */
+	write_gran_128bytes,	/* If less than 128 bytes are written, the unwritten bytes are undefined. */
 	write_gran_264bytes,	/* If less than 264 bytes are written, the unwritten bytes are undefined. */
 	write_gran_512bytes,	/* If less than 512 bytes are written, the unwritten bytes are undefined. */
 	write_gran_528bytes,	/* If less than 528 bytes are written, the unwritten bytes are undefined. */
diff --git a/flashrom.c b/flashrom.c
index d51a44c..c9c7e31 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -781,6 +781,9 @@
 				break;
 			}
 		break;
+	case write_gran_128bytes:
+		result = need_erase_gran_bytes(have, want, len, 128);
+		break;
 	case write_gran_256bytes:
 		result = need_erase_gran_bytes(have, want, len, 256);
 		break;
@@ -847,6 +850,9 @@
 	case write_gran_1byte_implicit_erase:
 		stride = 1;
 		break;
+	case write_gran_128bytes:
+		stride = 128;
+		break;
 	case write_gran_256bytes:
 		stride = 256;
 		break;