diff --git a/doc/gatt-api.txt b/doc/gatt-api.txt
index 2a8da75..7cb7c0d 100644
--- a/doc/gatt-api.txt
+++ b/doc/gatt-api.txt
@@ -68,6 +68,7 @@ Methods		array{byte} ReadValue(dict options)
 			operation was successful.
 
 			Possible options: "offset": uint16 offset
+					  "mtu": Exchanged MTU (Server only)
 					  "device": Object Device (Server only)
 
 			Possible Errors: org.bluez.Error.Failed
@@ -83,6 +84,7 @@ Methods		array{byte} ReadValue(dict options)
 			characteristic.
 
 			Possible options: "offset": Start offset
+					  "mtu": Exchanged MTU (Server only)
 					  "device": Device path (Server only)
 					  "link": Link type (Server only)
 					  "prepare-authorize": boolean Is prepare
@@ -120,7 +122,7 @@ Methods		array{byte} ReadValue(dict options)
 			reconnections as the MTU has to be renegotiated.
 
 			Possible options: "device": Object Device (Server only)
-					  "MTU": Exchanged MTU (Server only)
+					  "mtu": Exchanged MTU (Server only)
 					  "link": Link type (Server only)
 
 			Possible Errors: org.bluez.Error.Failed
@@ -156,7 +158,7 @@ Methods		array{byte} ReadValue(dict options)
 			reconnections as the MTU has to be renegotiated.
 
 			Possible options: "device": Object Device (Server only)
-					  "MTU": Exchanged MTU (Server only)
+					  "mtu": Exchanged MTU (Server only)
 					  "link": Link type (Server only)
 
 			Possible Errors: org.bluez.Error.Failed