diff --git a/Project.toml b/Project.toml
index 43acaff..e71a35e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "StructHelpers"
 uuid = "4093c41a-2008-41fd-82b8-e3f9d02b504f"
 authors = ["Jan Weidner <jw3126@gmail.com> and contributors"]
-version = "0.1.5"
+version = "1.0"
 
 [deps]
 ConstructionBase = "187b0558-2788-49d3-abe0-74a17ed4e7c9"
diff --git a/src/StructHelpers.jl b/src/StructHelpers.jl
index 795044d..18a6486 100644
--- a/src/StructHelpers.jl
+++ b/src/StructHelpers.jl
@@ -122,7 +122,8 @@ macro batteries(T, kw...)
         if val isa Bool
 
         elseif pname == :typesalt
-            if !(val isa Union{Nothing,Integer})
+            typesalt = val
+            if !(typesalt isa Union{Nothing,Integer})
                 error("""`typesalt` must be literally `nothing` or an unsigned integer. Got:
                       typesalt = $(repr(typesalt))::$(typeof(typesalt))
                       """)