diff --git a/doc/adapter-api.txt b/doc/adapter-api.txt
index 1959694..cef6cbe 100644
--- a/doc/adapter-api.txt
+++ b/doc/adapter-api.txt
@@ -148,3 +148,8 @@ Properties	string Address [readonly]
 
 			List of 128-bit UUIDs that represents the available
 			local services.
+
+		string Modalias [readonly, optional]
+
+			Local Device ID information in modalias format
+			used by the kernel and udev.
diff --git a/doc/device-api.txt b/doc/device-api.txt
index 6aa2c5b..aed6bed 100644
--- a/doc/device-api.txt
+++ b/doc/device-api.txt
@@ -188,3 +188,8 @@ Properties	string Address [readonly]
 			Note that this property can exhibit false-positives
 			in the case of Bluetooth 2.1 (or newer) devices that
 			have disabled Extended Inquiry Response support.
+
+		string Modalias [readonly, optional]
+
+			Remote Device ID information in modalias format
+			used by the kernel and udev.