diff --git a/src/main.rs b/src/main.rs
index 9bf1074..9f95da8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -324,6 +324,41 @@ fn compile(code: &String, run_symbol: &String, output_filename: &Path) -> Result
         }
     }
 
+    let ty = composer
+        .unifier
+        .add_ty(typedef::TypeEnum::TFunc(typedef::FunSignature {
+            args: vec![typedef::FuncArg {
+                name: "value".into(),
+                ty: primitive.float,
+                default_value: None,
+                is_vararg: false,
+            }],
+            ret: primitive.float,
+            vars: typedef::VarMap::new(),
+        }));
+    let name_ref = "slider".into();
+    let mut function_def = composer::TopLevelComposer::make_top_level_function_def(
+            "slider".to_string(),
+            name_ref,
+            ty,
+            Some(resolver.clone()),
+            None,
+        );
+    if let toplevel::TopLevelDef::Function { ref mut instance_to_symbol, .. } = function_def {
+        instance_to_symbol.insert("".to_string(), "__nac3_cells_slider".to_string());
+    } else {
+        unreachable!();
+    };
+    composer.definition_ast_list.push((
+        RwLock::new(function_def).into(),
+        None,
+    ));
+    internal_resolver.add_id_def(
+        name_ref,
+        toplevel::DefinitionId(composer.definition_ast_list.len() - 1),
+    );
+    internal_resolver.add_id_type(name_ref, ty);
+
     let signature = typedef::FunSignature {
         args: vec![],
         ret: primitive.none,