diff --git a/bin/pre.slime b/bin/pre.slime
index a5584bc..6c2be08 100644
--- a/bin/pre.slime
+++ b/bin/pre.slime
@@ -411,7 +411,7 @@ by the key 'from' and ends with the number defined in 'to'."
   result)
 
 (define (map fun seq)
-  :doc "Takes a function and a sequence as arguments and returns a new
+  "Takes a function and a sequence as arguments and returns a new
 sequence which contains the results of using the first sequences
 elemens as argument to that function."
   (if (null? seq)
diff --git a/src/built_ins.cpp b/src/built_ins.cpp
index 3e90afa..fab2f56 100644
--- a/src/built_ins.cpp
+++ b/src/built_ins.cpp
@@ -229,12 +229,10 @@ namespace Slime {
             Lisp_Object_Type type = Memory::get_type(definee);
             switch (type) {
             case Lisp_Object_Type::Symbol: {
-                // BUG(Felix): Defining with doc string crashes
                 if (form != Memory::nil) {
                     Lisp_Object* doc = thing;
                     try_void assert_type(doc,  Lisp_Object_Type::String);
                     try_void assert_type(form, Lisp_Object_Type::Pair);
-                    form = form->value.pair.rest;
                     thing = form->value.pair.first;
                     try_void assert(form->value.pair.rest == Memory::nil);
                     // TODO docs
@@ -1053,16 +1051,17 @@ namespace Slime {
             }
             return Memory::t;
         };
-        define((print (:sep " ") (:end "\n") . things), "TODO") {
+        define((print (:sep " ") (:end "\n") (:repr ()) . things), "TODO") {
             profile_with_name("(print)");
-            fetch(sep, end, things);
+            fetch(sep, end, repr, things);
 
             if (things != Memory::nil) {
-                print(things->value.pair.first);
+                bool print_repr = repr != Memory::nil;
+                print(things->value.pair.first, repr);
 
                 for_lisp_list(things->value.pair.rest) {
                     print(sep);
-                    print(it);
+                    print(it, repr);
                 }
             }
 
diff --git a/src/io.cpp b/src/io.cpp
index 289a664..3c0749c 100644
--- a/src/io.cpp
+++ b/src/io.cpp
@@ -304,7 +304,7 @@ namespace Slime {
     }
 
     proc string_buider_to_string(Array_List<char*> string_builder) -> char* {
-        int len = 1;
+        size_t len = 1;
         int idx = 0;
         for (auto str : string_builder) {
             len += strlen(str);
@@ -479,6 +479,10 @@ namespace Slime {
 
             return string_buider_to_string(string_builder);
         }
+        default:
+            create_generic_error("A Lisp_Object of type-id %d cannot be converted to a string",
+                                 (int)(Memory::get_type(node)));
+            return nullptr;
         }
     }