diff --git a/regex/postfixNode.go b/regex/postfixNode.go
index 67991be..70f3d79 100644
--- a/regex/postfixNode.go
+++ b/regex/postfixNode.go
@@ -2,7 +2,7 @@ package regex
 
 import "fmt"
 
-type NodeType int
+type nodeType int
 
 // This is a slice containing all escapable characters that have special meaning.
 // Eg. \b is word boundary, \w is word character etc.
@@ -10,7 +10,7 @@ var escapedChars []rune = []rune("wWdDbBnaftrvsS0")
 
 // This is a list of the possible node types
 const (
-	characterNode NodeType = iota
+	characterNode nodeType = iota
 	charclassNode
 	pipeNode
 	concatenateNode
@@ -31,7 +31,7 @@ const lookbehind = -1
 var infinite_reps int = -1 // Represents infinite reps eg. the end range in {5,}
 // This represents a node in the postfix representation of the expression
 type postfixNode struct {
-	nodetype       NodeType
+	nodetype       nodeType
 	contents       []rune        // Contents of the node
 	startReps      int           // Minimum number of times the node should be repeated - used with numeric specifiers
 	endReps        int           // Maximum number of times the node should be repeated - used with numeric specifiers