diff --git a/src/c/ops/eval.c b/src/c/ops/eval.c
index 830cceb..3778a35 100644
--- a/src/c/ops/eval.c
+++ b/src/c/ops/eval.c
@@ -40,24 +40,24 @@ struct pso_pointer lisp_eval( struct pso_pointer frame_pointer,
     struct pso4 *frame = pointer_to_pso4( frame_pointer );
     struct pso_pointer result = frame->payload.stack_frame.arg[0];
 
-    // switch ( get_tag_value( result)) {
+    switch ( get_tag_value( result)) {
     //     case CONSTV:
     //         result = eval_cons( frame, frame_pointer, env);
     //         break;
     //     case KEYTV:
-    //     case SYMBOLTV:
-    //         result = eval_symbol( frame, frame_pointer, env);
-    //         break;
-    //     case LAMBDATV:
-    //         result = eval_lambda( frame, frame_pointer, env);
-    //         break;
-    //     case NLAMBDATV:
-    //         result = eval_nlambda( frame, frame_pointer, env);
-    //         break;
-    //     case SPECIALTV:
-    //         result = eval_special( frame, frame_pointer, env);
-    //         break;        
-    // }
+         case SYMBOLTV:
+             result = eval_symbol( frame_pointer, env);
+             break;
+         case LAMBDATV:
+             result = eval_lambda( frame_pointer, env);
+             break;
+         case NLAMBDATV:
+             result = eval_nlambda( frame_pointer, env);
+             break;
+         case SPECIALTV:
+             result = eval_special( frame, frame_pointer, env);
+             break;
+     }
 
     if ( exceptionp( result ) ) {
         struct pso3 *x =