diff --git a/src/RuntimeGeneratedFunctions.jl b/src/RuntimeGeneratedFunctions.jl
index e232917..5bddd4f 100644
--- a/src/RuntimeGeneratedFunctions.jl
+++ b/src/RuntimeGeneratedFunctions.jl
@@ -54,7 +54,8 @@ struct RuntimeGeneratedFunction{argnames, cache_tag, context_tag, id, B} <: Func
     body::B
     function RuntimeGeneratedFunction(cache_tag, context_tag, ex; opaque_closures = true)
         def = splitdef(ex)
-        args, body = normalize_args(def[:args]), def[:body]
+        args = normalize_args(get(def, :args, Symbol[]))
+        body = def[:body]
         if opaque_closures && isdefined(Base, :Experimental) &&
            isdefined(Base.Experimental, Symbol("@opaque"))
             body = closures_to_opaque(body)
diff --git a/test/runtests.jl b/test/runtests.jl
index 768ea94..53a718b 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -28,10 +28,13 @@ ex3 = :(function (_du::T, _u::Vector{E}, _p::P, _t::Any) where {T <: Vector, E,
     nothing
 end)
 
+f0 = @RuntimeGeneratedFunction(:(()->42))
 f1 = @RuntimeGeneratedFunction(ex1)
 f2 = @RuntimeGeneratedFunction(ex2)
 f3 = @RuntimeGeneratedFunction(ex3)
 
+@test f0() === 42
+
 @test f1 isa Function
 
 du = rand(2)