Yep!
```julia
In  [2]: function test()
	global const a = int8(1)
end

Out [2]: test (generic function with 1 method)

In  [3]: test()

Out [3]: 1

In  [4]: a

Out [4]: 1

In  [5]: a = 5

Out [5]: ERROR: invalid redefinition of constant a
while loading In[5], in expression starting on line 1

```