diff --git a/hy/compiler.py b/hy/compiler.py
index 19e8bcb..349ceff 100755
--- a/hy/compiler.py
+++ b/hy/compiler.py
@@ -83,6 +83,8 @@ def builds(*types, **kwargs):
 
     def _dec(fn):
         for t in types:
+            if isinstance(t, string_types):
+                t = ast_str(t)
             _compile_table[t] = fn
         return fn
     return _dec
@@ -415,6 +417,8 @@ class HyASTCompiler(object):
         return ret.stmts
 
     def compile_atom(self, atom_type, atom):
+        if isinstance(atom_type, string_types):
+            atom_type = ast_str(atom_type)
         if atom_type in _compile_table:
             # _compile_table[atom_type] is a method for compiling this
             # type of atom, so call it. If it has an extra parameter,
@@ -1530,15 +1534,16 @@ class HyASTCompiler(object):
                                values=[value.force_expr for value in values])
         return ret
 
-    def _compile_compare_op_expression(self, expression):
-        ops = {"=": ast.Eq, "!=": ast.NotEq,
-               "<": ast.Lt, "<=": ast.LtE,
-               ">": ast.Gt, ">=": ast.GtE,
-               "is": ast.Is, "is-not": ast.IsNot,
-               "in": ast.In, "not-in": ast.NotIn}
+    ops = {"=": ast.Eq, "!=": ast.NotEq,
+           "<": ast.Lt, "<=": ast.LtE,
+           ">": ast.Gt, ">=": ast.GtE,
+           "is": ast.Is, "is-not": ast.IsNot,
+           "in": ast.In, "not-in": ast.NotIn}
+    ops = {ast_str(k): v for k, v in ops.items()}
 
-        inv = expression.pop(0)
-        ops = [ops[inv]() for _ in range(len(expression) - 1)]
+    def _compile_compare_op_expression(self, expression):
+        inv = ast_str(expression.pop(0))
+        ops = [self.ops[inv]() for _ in range(len(expression) - 1)]
 
         e = expression[0]
         exprs, ret, _ = self._compile_collect(expression)
@@ -2115,7 +2120,7 @@ class HyASTCompiler(object):
                             compile_time_ns(self.module_name),
                             self.module_name)
         return (self._compile_branch(expression[1:])
-                if building == "eval-and-compile"
+                if building == "eval_and_compile"
                 else Result())
 
     @builds(HyCons)
diff --git a/hy/contrib/walk.hy b/hy/contrib/walk.hy
index d61bb62..709c252 100644
--- a/hy/contrib/walk.hy
+++ b/hy/contrib/walk.hy
@@ -7,6 +7,7 @@
         [functools [partial]]
         [collections [OrderedDict]]
         [hy.macros [macroexpand :as mexpand]]
+        [hy.lex.parser [hy-symbol-mangle]]
         [hy.compiler [HyASTCompiler]])
 
 (defn walk [inner outer form]
@@ -257,7 +258,7 @@ Arguments without a header are under None.
         (= head 'defclass) (self.handle-defclass)
         (= head 'quasiquote) (self.+quote)
         ;; must be checked last!
-        (in head special-forms) (self.handle-special-form)
+        (in (hy-symbol-mangle (string head)) special-forms) (self.handle-special-form)
         ;; Not a special form. Traverse it like a coll
         (self.handle-coll)))
 
diff --git a/tests/native_tests/mangling.hy b/tests/native_tests/mangling.hy
index b83365e..14c7e37 100644
--- a/tests/native_tests/mangling.hy
+++ b/tests/native_tests/mangling.hy
@@ -124,6 +124,15 @@
   (assert (= x "aabb")))
 
 
+(defn test-special-form []
+  (setv not-in 1)
+  ; We set the variable to make sure that if this test works, it's
+  ; because we're calling the special form instead of the shadow
+  ; function.
+  (assert (is (not-in 2 [1 2 3]) False))
+  (assert (is (not_in 2 [1 2 3]) False)))
+
+
 (defn test-python-keyword []
   (setv if 3)
   (assert (= if 3))