diff --git a/src/avrdude.conf.in b/src/avrdude.conf.in
index e4d53298..c76e80bb 100644
--- a/src/avrdude.conf.in
+++ b/src/avrdude.conf.in
@@ -3111,7 +3111,13 @@ part
     memory "lock"
         size               = 1;
         read               = "0010.0100--xxxx.xxxx--xxxx.xxxx--xxxo.ooxx";
-        # Nonstandard lock write is available but not implemented
+        # Nonstandard write
+        # See datasheet Page 20, Note 1 https://ww1.microchip.com/downloads/en/DeviceDoc/doc2487.pdf
+        # Activating lock mode 0: -U lock:w:0:m
+        # Activating lock mode 1: -U lock:w:0:m -U lock:w:1:m
+        # Activating lock mode 2: -U lock:w:0:m -U lock:w:1:m -U lock:w:2:m
+        # Activating lock mode 3: -U lock:w:0:m -U lock:w:1:m -U lock:w:2:m -U lock:w:3:m
+        write              = "1010.1100--1110.00ii--xxxx.xxxx--xxxx.xxxx";
     ;
 
     memory "signature"
diff --git a/src/libavrdude.h b/src/libavrdude.h
index 09f0966d..5a5c49e9 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -176,7 +176,7 @@ enum ctl_stack_t {
 typedef struct cmdbit {
   int          type;  /* AVR_CMDBIT_* */
   int          bitno; /* which input bit to use for this command bit */
-  int          value; /* bit value if type == AVR_CMDBIT_VALUD */
+  int          value; /* bit value if type == AVR_CMDBIT_VALUE */
 } CMDBIT;
 
 typedef struct opcode {