diff --git a/src/Compat.jl b/src/Compat.jl
index a9713696d..a634390d5 100644
--- a/src/Compat.jl
+++ b/src/Compat.jl
@@ -397,7 +397,7 @@ if VERSION < v"0.4.0-dev+3732"
         calltypes[k] = v
     end
 elseif VERSION < v"0.5.0-dev+3831"
-    Base.Symbol(args...) = symbol(args...)
+    Base.Symbol(args...) = symbol(args...)::Symbol
 end
 
 if VERSION < v"0.5.0-dev+2396"