diff --git a/androscalpel/src/instructions.rs b/androscalpel/src/instructions.rs
index dc85dfb..bfc5302 100644
--- a/androscalpel/src/instructions.rs
+++ b/androscalpel/src/instructions.rs
@@ -102,24 +102,30 @@ pub enum Instruction {
     /// Check if an object if an instance of a type.
     /// (put 1 in the dest register if yes, else 0)
     InstanceOf {
-        /// 4 bit register
+        /// 4 bits register
         dest: u8,
-        /// 4 bit register
+        /// 4 bits register
         obj: u8,
         lit: IdType,
     },
     /// Get the number of item in an array.
     /// (put the lenght in the dest register)
     ArrayLength {
-        /// 4 bit register
+        /// 4 bits register
         dest: u8,
-        /// 4 bit register
+        /// 4 bits register
         arr: u8,
     },
     /// Construct a new instance of the indicated type and store a reference to it.
     NewInstance { reg: u8, lit: IdType },
     /// Construct a new array of the indicated type and size in size_reg and store a reference to it.
-    NewArray { reg: u8, size_reg: u8, lit: IdType },
+    NewArray {
+        /// 4 bits register
+        reg: u8,
+        /// 4 bits register
+        size_reg: u8,
+        lit: IdType,
+    },
     /// Construct a new array of the indicated type and size fill it with the values of the
     /// given registers.
     ///