diff --git a/package.json b/package.json
index c63fbf42..81c5d218 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bem-react-core",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "BEM React Core",
   "repository": {
     "url": "git://github.com/bem/bem-react-core.git",
diff --git a/src/Bem.js b/src/Bem.js
index 07eb5303..362ba366 100644
--- a/src/Bem.js
+++ b/src/Bem.js
@@ -13,7 +13,7 @@ const bemModes = {
     cls : 1
 };
 
-export default function({ preset, naming }) {
+export default function({ preset, naming, beforeStringify }) {
     const { Base, classAttribute, Render, typeField, attrsField } = preset,
         getRenderProps = function(instance, props) {
             const mergedProps = {
@@ -120,8 +120,15 @@ export default function({ preset, naming }) {
 
                     cls && entities.push(cls.toString());
 
-                    return entities.map(entity => typeof entity === 'string'?
-                        entity : entityClassName(entity)).join(' ');
+                    return entities.map((entity) => {
+                        if(typeof entity === 'string')
+                            return entity;
+
+                        if(typeof beforeStringify === 'function')
+                            return beforeStringify(entityClassName(entity));
+
+                        return entityClassName(entity);
+                    }).join(' ');
                 }
             };
         };
diff --git a/src/presets/React.d.ts b/src/presets/React.d.ts
index 2638d163..9ce7fc28 100644
--- a/src/presets/React.d.ts
+++ b/src/presets/React.d.ts
@@ -21,7 +21,7 @@ export interface JsonMix {
     elemMods?: Mods;
 }
 
-export type Mix = JsonMix | JsonMix[] | string | JSX.Element | JSX.Element[];
+export type Mix = JsonMix | JsonMix[] | JSX.Element | JSX.Element[];
 export type Replaceble = null | number | string | JSX.Element;
 
 export declare interface Block {