diff --git a/nac3core/src/codegen/expr.rs b/nac3core/src/codegen/expr.rs
index e5aa9b6e..83547bfa 100644
--- a/nac3core/src/codegen/expr.rs
+++ b/nac3core/src/codegen/expr.rs
@@ -150,7 +150,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
             } = &mut *definition.write()
             {
                 instance_to_symbol.get(&key).cloned().unwrap_or_else(|| {
-                    let symbol = format!("{}_{}", name, instance_to_symbol.len());
+                    let symbol = format!("{}.{}", name, instance_to_symbol.len());
                     instance_to_symbol.insert(key, symbol.clone());
                     let key = self.get_subst_key(obj.map(|a| a.0), fun.0, Some(var_id));
                     let instance = instance_to_stmt.get(&key).unwrap();
diff --git a/nac3core/src/toplevel/composer.rs b/nac3core/src/toplevel/composer.rs
index 5819be38..b961ccd8 100644
--- a/nac3core/src/toplevel/composer.rs
+++ b/nac3core/src/toplevel/composer.rs
@@ -183,12 +183,6 @@ impl TopLevelComposer {
                         if self.keyword_list.contains(method_name) {
                             return Err("cannot use keyword as a method name".into());
                         }
-                        if method_name.ends_with(|x: char| x.is_ascii_digit()) {
-                            return Err(format!(
-                                "function name `{}` must not end with numbers",
-                                method_name
-                            ));
-                        }
                         let global_class_method_name = {
                             let mut n = mod_path.clone();
                             n.push_str(
@@ -253,9 +247,6 @@ impl TopLevelComposer {
                 if self.keyword_list.contains(name) {
                     return Err("cannot use keyword as a top level function name".into());
                 }
-                if name.ends_with(|x: char| x.is_ascii_digit()) {
-                    return Err(format!("function name `{}` must not end with numbers", name));
-                }
                 let fun_name = name.to_string();
                 let global_fun_name = {
                     let mut n = mod_path;
diff --git a/nac3core/src/toplevel/mod.rs b/nac3core/src/toplevel/mod.rs
index 4076931f..edc5becd 100644
--- a/nac3core/src/toplevel/mod.rs
+++ b/nac3core/src/toplevel/mod.rs
@@ -57,7 +57,7 @@ pub enum TopLevelDef {
         constructor: Option<Type>,
     },
     Function {
-        // prefix for symbol, should be unique globally, and not ending with numbers
+        // prefix for symbol, should be unique globally
         name: String,
         // simple name, the same as in method/function definition
         simple_name: String,