diff --git a/diff.js b/diff.js
index bf1f776..60f9236 100644
--- a/diff.js
+++ b/diff.js
@@ -1393,6 +1393,8 @@ module.Types = {
 			// NOTE: we can't use a == b directly because of things like
 			// 		[2] == 2 -> true...
 			return a === b 
+				// special-case: NaN...
+				|| (isNaN(a) && isNaN(b))
 				// basic patters...
 				|| a === that.ANY 
 				|| b === that.ANY 
@@ -1515,6 +1517,8 @@ module.Types = {
 			// NOTE: we can't use a == b directly because of things like
 			// 		[2] == 2 -> true...
 			return a === b 
+				// special-case: NaN...
+				|| (isNaN(a) && isNaN(b))
 				// basic patters...
 				|| a === that.ANY 
 				|| b === that.ANY 
diff --git a/test.js b/test.js
old mode 100644
new mode 100755
index 3db29a3..c9d6205
--- a/test.js
+++ b/test.js
@@ -1,88 +1,88 @@
-#!/usr/bin/env node
-/**********************************************************************
-* 
-* test.js
-*
-* Repo and docs:
-* 	https://github.com/flynx/test.js
-*
-***********************************************/ /* c8 ignore next 2 */
-((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
-(function(require){ var module={} // make module AMD/node compatible...
-/*********************************************************************/
-
-var test = require('ig-test')
-
-var diff = require('./diff')
-var format = require('./format')
-
-
-//---------------------------------------------------------------------
-
-test.Setups({
-	// XXX make this return a list...
-	basic: function(assert){
-		return [
-			{
-				A: {}, B: {},
-				cmp: true,
-			},
-			{
-				A: [], B: [],
-				cmp: true,
-			},
-			{
-				A: 0, B: 0,
-				cmp: true,
-			},
-			{
-				A: 123, B: 123,
-				cmp: true,
-			},
-			{
-				A: false, B: false,
-				cmp: true,
-			},
-			{
-				A: undefined, B: undefined,
-				cmp: true,
-			},
-			// XXX special case -- fails....
-			{
-				A: NaN, B: NaN,
-				cmp: true,
-			},
-		] },
-})
-
-test.Tests({
-	cmp: function(assert, setup){
-		setup = setup instanceof Array ? setup : [setup]
-		setup.forEach(function(e){
-			var res
-			'cmp' in e
-				&& assert(
-					(res = diff.cmp(e.A, e.B)) == e.cmp, 
-					`cmp(..): cmp(${e.A}, ${e.B}) should be ${e.cmp} got ${res}`) }) },
-})
-
-test.Cases({
-	'basics': function(assert){
-		// XXX move reference objects + expected diffs to setups
-		a = {}
-		b = {}
-
-		assert(diff.Diff(a, b), 'Diff(..)')
-	},
-})
-
-
-//---------------------------------------------------------------------
-typeof(__filename) != 'undefined'
-	&& __filename == (require.main || {}).filename
-	&& test.run()
-
-
-
-/**********************************************************************
-* vim:set ts=4 sw=4 :                               */ return module })
+#!/usr/bin/env node
+/**********************************************************************
+* 
+* test.js
+*
+* Repo and docs:
+* 	https://github.com/flynx/test.js
+*
+***********************************************/ /* c8 ignore next 2 */
+((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
+(function(require){ var module={} // make module AMD/node compatible...
+/*********************************************************************/
+
+var test = require('ig-test')
+
+var diff = require('./diff')
+var format = require('./format')
+
+
+//---------------------------------------------------------------------
+
+test.Setups({
+	// XXX make this return a list...
+	basic: function(assert){
+		return [
+			{
+				A: {}, B: {},
+				cmp: true,
+			},
+			{
+				A: [], B: [],
+				cmp: true,
+			},
+			{
+				A: 0, B: 0,
+				cmp: true,
+			},
+			{
+				A: 123, B: 123,
+				cmp: true,
+			},
+			{
+				A: false, B: false,
+				cmp: true,
+			},
+			{
+				A: undefined, B: undefined,
+				cmp: true,
+			},
+			// XXX special case -- fails....
+			{
+				A: NaN, B: NaN,
+				cmp: true,
+			},
+		] },
+})
+
+test.Tests({
+	cmp: function(assert, setup){
+		setup = setup instanceof Array ? setup : [setup]
+		setup.forEach(function(e){
+			var res
+			'cmp' in e
+				&& assert(
+					(res = diff.cmp(e.A, e.B)) == e.cmp, 
+					`cmp(..): cmp(${e.A}, ${e.B}) should be ${e.cmp} got ${res}`) }) },
+})
+
+test.Cases({
+	'basics': function(assert){
+		// XXX move reference objects + expected diffs to setups
+		a = {}
+		b = {}
+
+		assert(diff.Diff(a, b), 'Diff(..)')
+	},
+})
+
+
+//---------------------------------------------------------------------
+typeof(__filename) != 'undefined'
+	&& __filename == (require.main || {}).filename
+	&& test.run()
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                               */ return module })