diff --git a/src/sled/nonstd/fsm.h b/src/sled/nonstd/fsm.h
index 8957825..da7c3c4 100644
--- a/src/sled/nonstd/fsm.h
+++ b/src/sled/nonstd/fsm.h
@@ -42,7 +42,7 @@ template<class F, class... Args>
 using invoke_result_t = std::invoke_result_t<F, Args...>;
 
 template<class F, class... Args>
-using fms_is_invocable = std::is_invocable<F, Args...>;
+using fsm_is_invocable = std::is_invocable<F, Args...>;
 #elif __cplusplus >= 201103L || _MSVC_LANG >= 201103L
 template<class F, class... Args>
 using invoke_result_t = typename std::result_of<F && (Args && ...)>::type;