diff --git a/schala-lang/language/src/eval.rs b/schala-lang/language/src/eval.rs
index 0c96451..f97add4 100644
--- a/schala-lang/language/src/eval.rs
+++ b/schala-lang/language/src/eval.rs
@@ -1,11 +1,10 @@
-
-use std::cell::RefCell;
 use std::rc::Rc;
 use std::fmt::Write;
 use std::io;
 
 use itertools::Itertools;
 
+use crate::schala::SymbolTableHandle;
 use crate::util::ScopeStack;
 use crate::reduced_ast::{BoundVars, ReducedAST, Stmt, Expr, Lit, Func, Alternative, Subpattern};
 use crate::symbol_table::{SymbolSpec, Symbol, SymbolTable, FullyQualifiedSymbolName};
@@ -15,11 +14,11 @@ mod test;
 
 pub struct State<'a> {
   values: ScopeStack<'a, Rc<String>, ValueEntry>,
-  symbol_table_handle: Rc<RefCell<SymbolTable>>,
+  symbol_table_handle: SymbolTableHandle,
 }
 
 impl<'a> State<'a> {
-  pub fn new(symbol_table_handle: Rc<RefCell<SymbolTable>>) -> State<'a> {
+  pub fn new(symbol_table_handle: SymbolTableHandle) -> State<'a> {
     let values = ScopeStack::new(Some(format!("global")));
     State { values, symbol_table_handle }
   }
diff --git a/schala-lang/language/src/schala.rs b/schala-lang/language/src/schala.rs
index 9516506..85548d1 100644
--- a/schala-lang/language/src/schala.rs
+++ b/schala-lang/language/src/schala.rs
@@ -12,6 +12,8 @@ LangMetaRequest, LangMetaResponse, GlobalOutputStats,
 DebugResponse, DebugAsk};
 use crate::{ast, reduced_ast, tokenizing, parsing, eval, typechecking, symbol_table};
 
+pub type SymbolTableHandle = Rc<RefCell<symbol_table::SymbolTable>>;
+
 /// All the state necessary to parse and execute a Schala program are stored in this struct.
 /// `state` represents the execution state for the AST-walking interpreter, the other fields
 /// should be self-explanatory.