diff --git a/lib/create_store.js b/lib/create_store.js
index ad2cb34..d9cf8a9 100644
--- a/lib/create_store.js
+++ b/lib/create_store.js
@@ -50,7 +50,8 @@ createStore.mixSpecIntoComponent = function mixSpecIntoComponent(component, spec
 
     // Functions are chained, with mixin functions being run before spec functions.
     else if (typeof spec[key] === "function") {
-      if (component[key]) {
+      // Allow users to mark a function as unchainable via 'chainable'
+      if (component[key] && component[key].chainable !== false) {
         // Only functions can be chained.
         if (typeof component[key] !== "function") {
           throw new FunctionChainingError(key);
@@ -58,6 +59,7 @@ createStore.mixSpecIntoComponent = function mixSpecIntoComponent(component, spec
         component[key] = createStore.createChainedFunction(component[key], spec[key]).bind(component);
       } else {
         component[key] = spec[key].bind(component);
+        if (spec[key].chainable === false) component[key].chainable = false;
       }
     }