diff --git a/src/reducers/reducer.init.js b/src/reducers/reducer.init.js
index 29c917e..f3a3257 100644
--- a/src/reducers/reducer.init.js
+++ b/src/reducers/reducer.init.js
@@ -15,8 +15,8 @@ export const initState = (changesArgument: number): stateType => {
           'a>ɯ/._#',
           '[+ sonorant - low rounded high back]>0/._.',
           '[+ obstruent]>[+ obstruent aspirated ]/#_.',
+          '[+ sonorant - rounded]>[+ sonorant + rounded]/._#'
           // 'nn>nun/._.',
-          // '[+ sonorant rounded]>[+ sonorant - rounded]/._#'
         ]
       }
     ],
diff --git a/src/reducers/reducer.results.test.js b/src/reducers/reducer.results.test.js
index 30de2fd..f5699ec 100644
--- a/src/reducers/reducer.results.test.js
+++ b/src/reducers/reducer.results.test.js
@@ -137,6 +137,19 @@ describe('Results', () => {
       }
     ]);
   });
+
+  it('results returned through fifth sound change rule', () => {
+    const action = {type: 'RUN'};
+    state = initState(5)
+    expect(stateReducer(state, action).results).toEqual([
+      {
+        pass: 'epoch 1',
+        lexicon: [
+          'annu', 'anat', 'ant', 'annu', 'tʰan', 'nnu'
+        ]
+      }
+    ]);
+  });
   
   // if('results returned from sound change suite', () => {
   //   const action = {type: 'RUN'};