diff --git a/lib/power-assert-formatter.js b/lib/power-assert-formatter.js
index 77190f5..4cdc8b1 100644
--- a/lib/power-assert-formatter.js
+++ b/lib/power-assert-formatter.js
@@ -210,6 +210,11 @@
                         value: esNode.value()
                     };
                     espathToPair[esNode.espath] = pair;
+                }
+            });
+            Object.keys(espathToPair).forEach(function (espath) {
+                var pair = espathToPair[espath];
+                if (pair.left && pair.right) {
                     pairs.push(pair);
                 }
             });
diff --git a/test/power_assert_formatter_test.js b/test/power_assert_formatter_test.js
index 8e7cb10..461c436 100644
--- a/test/power_assert_formatter_test.js
+++ b/test/power_assert_formatter_test.js
@@ -1685,6 +1685,20 @@ suite('power-assert-formatter', function () {
             ]);
         });
 
+        test('Function object equality', function () {
+            assertPowerAssertContextFormatting(function () {
+                eval(weave('assert(function(x,y){ return x + y; } == new Function("x", "y", "return x + y"));'));
+            }, [
+                '# /path/to/some_test.js:1',
+                '',
+                'assert(function (x, y) {return x + y;} == new Function("x", "y", "return x + y"))',
+                '                                       |  |                                      ',
+                '                                       |  #function#                             ',
+                '                                       false                                     ',
+                ''
+            ]);
+        });
+
     });