diff --git a/data.c b/data.c
index accdfaef..4a204145 100644
--- a/data.c
+++ b/data.c
@@ -95,7 +95,7 @@ struct data data_copy_file(FILE *f, size_t maxlen)
 {
 	struct data d = empty_data;
 
-	d = data_add_marker(d, TYPE_BLOB, NULL);
+	d = data_add_marker(d, TYPE_NONE, NULL);
 	while (!feof(f) && (d.len < maxlen)) {
 		size_t chunksize, ret;
 
diff --git a/dtc.h b/dtc.h
index 303c2a6a..51c03ef6 100644
--- a/dtc.h
+++ b/dtc.h
@@ -82,7 +82,6 @@ enum markertype {
 	TYPE_UINT16,
 	TYPE_UINT32,
 	TYPE_UINT64,
-	TYPE_BLOB,
 	TYPE_STRING,
 };
 extern const char *markername(enum markertype markertype);
diff --git a/treesource.c b/treesource.c
index f99544d7..53e62036 100644
--- a/treesource.c
+++ b/treesource.c
@@ -133,9 +133,14 @@ static void write_propval_int(FILE *f, const char *p, size_t len, size_t width)
 	}
 }
 
+static bool has_data_type_information(struct marker *m)
+{
+	return m->type >= TYPE_UINT8;
+}
+
 static struct marker *next_type_marker(struct marker *m)
 {
-	while (m && (m->type == LABEL || m->type == REF_PHANDLE || m->type == REF_PATH))
+	while (m && !has_data_type_information(m))
 		m = m->next;
 	return m;
 }
@@ -225,7 +230,7 @@ static void write_propval(FILE *f, struct property *prop)
 		size_t chunk_len;
 		const char *p = &prop->val.val[m->offset];
 
-		if (m->type < TYPE_UINT8)
+		if (!has_data_type_information(m))
 			continue;
 
 		chunk_len = type_marker_length(m);