diff --git a/src/__tests__/incline-test.js b/src/__tests__/incline-test.js
index 007004e..0f95aad 100644
--- a/src/__tests__/incline-test.js
+++ b/src/__tests__/incline-test.js
@@ -34,6 +34,7 @@ describe('lvovich/incline', () => {
   describe('inclineFirstname()', () => {
     it('should incline firstname', () => {
       expect(inclineFirstname('Павел', 'genitive')).toEqual('Павла');
+      expect(inclineFirstname('Санёк', 'genitive')).toEqual('Санька');
     });
 
     it('should accept gender for androgynous name', () => {
diff --git a/src/rules/inclineRulesFirstname.js b/src/rules/inclineRulesFirstname.js
index fb53b96..de469e0 100644
--- a/src/rules/inclineRulesFirstname.js
+++ b/src/rules/inclineRulesFirstname.js
@@ -181,6 +181,11 @@ const name: DeclensionRuleSetT = {
       test: ['ёл'],
       mods: ['--ла', '--лу', '--ла', '--лом', '--ле'],
     },
+    {
+      gender: 'male',
+      test: ['ёк'],
+      mods: ['--ька', '--ьку', '--ька', '--ьком', '--ьке'],
+    },
     {
       gender: 'male',
       test: [