diff --git a/lib/libfdt/fdt_rw.c b/lib/libfdt/fdt_rw.c
index 9ed0d4d..a3f8fad 100644
--- a/lib/libfdt/fdt_rw.c
+++ b/lib/libfdt/fdt_rw.c
@@ -316,6 +316,36 @@
 	return 0;
 }
 
+int fdt_appendprop_str(void *fdt, int nodeoffset, const char *name,
+		   const void *val, int len)
+{
+	struct fdt_property *prop;
+	int err, oldlen, newlen;
+
+	FDT_RW_CHECK_HEADER(fdt);
+
+	prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
+	if (prop) {
+		newlen = len + oldlen;
+		err = _fdt_splice_struct(fdt, prop->data,
+					 FDT_TAGALIGN(oldlen),
+					 FDT_TAGALIGN(newlen));
+		if (err)
+			return err;
+		prop->len = cpu_to_fdt32(newlen);
+
+		/* Add space to separate the appended strings */
+		prop->data[oldlen-1] = 0x20;
+		memcpy(prop->data + oldlen, val, len);
+	} else {
+		err = _fdt_add_property(fdt, nodeoffset, name, len, &prop);
+		if (err)
+			return err;
+		memcpy(prop->data, val, len);
+	}
+	return 0;
+}
+
 int fdt_delprop(void *fdt, int nodeoffset, const char *name)
 {
 	struct fdt_property *prop;
diff --git a/lib/libfdt/libfdt.h b/lib/libfdt/libfdt.h
index 73f4975..667964c 100644
--- a/lib/libfdt/libfdt.h
+++ b/lib/libfdt/libfdt.h
@@ -1264,6 +1264,35 @@
  */
 int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
 		   const void *val, int len);
+/**
+ * fdt_appendprop_str - append a string value to a property
+ * @fdt: pointer to the device tree blob
+ * @nodeoffset: offset of the node whose property to change
+ * @name: name of the property to append to
+ * @val: pointer to data to append to the property value
+ * @len: length of the data to append to the property value
+ *
+ * fdt_appendprop_str() appends the string value to the named property
+ * in the given node, creating the property if it does not already exist.
+ *
+ * This function may insert data into the blob along with a space between
+ * the the two strings and will therefore change the offsets of some existing nodes.
+ *
+ * returns:
+ *	0, on success
+ *	-FDT_ERR_NOSPACE, there is insufficient free space in the blob to
+ *		contain the new property value
+ *	-FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_BADMAGIC,
+ *	-FDT_ERR_BADVERSION,
+ *	-FDT_ERR_BADSTATE,
+ *	-FDT_ERR_BADSTRUCTURE,
+ *	-FDT_ERR_BADLAYOUT,
+ *	-FDT_ERR_TRUNCATED, standard meanings
+ */
+int fdt_appendprop_str(void *fdt, int nodeoffset, const char *name,
+		   const void *val, int len);
 
 /**
  * fdt_appendprop_u32 - append a 32-bit integer value to a property
@@ -1374,7 +1403,7 @@
  *	-FDT_ERR_TRUNCATED, standard meanings
  */
 #define fdt_appendprop_string(fdt, nodeoffset, name, str) \
-	fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
+	fdt_appendprop_str((fdt), (nodeoffset), (name), (str), strlen(str)+1)
 
 /**
  * fdt_delprop - delete a property