diff --git a/docs.md b/docs.md
index 17ad1cc..8043a68 100644
--- a/docs.md
+++ b/docs.md
@@ -1,6 +1,6 @@
 # Click4 Documentation
 
-__v12 #fbc68c1__
+__v15 #6a46a47__
 
 ## 0: NOP
 
@@ -39,7 +39,7 @@ __v12 #fbc68c1__
 
 ## 5: NAND
 
-* Info: NAND the values of registers defined by ARG1 and ARG2 and store in register defined by ARG0.
+* Info: NAND the values of registers defined by ARG2 and ARG3 and store in register defined by ARG1.
 * Args: 3
 * Color: 182,255,0
 * Sound: Note C# [Cs.wav]
diff --git a/src/ops.lua b/src/ops.lua
index 7e43be2..7cea11c 100644
--- a/src/ops.lua
+++ b/src/ops.lua
@@ -54,7 +54,7 @@ table.insert(ops,{
 
 table.insert(ops,{
   label = "NAND",
-  info = "NAND the values of registers defined by ARG1 and ARG2 and store in register defined by ARG0.",
+  info = "NAND the values of registers defined by ARG2 and ARG3 and store in register defined by ARG1.",
   exe = function(self)
     local a = self.registers[ self.args[2] ]
     local b = self.registers[ self.args[3] ]