diff --git a/fastjsonschema/draft06.py b/fastjsonschema/draft06.py
index 517c4d5..f5aca06 100644
--- a/fastjsonschema/draft06.py
+++ b/fastjsonschema/draft06.py
@@ -40,6 +40,8 @@ def generate_boolean_schema(self):
         Means that schema can be specified by boolean.
         True means everything is valid, False everything is invalid.
         """
+        if self._definition is True:
+            self.l('pass')
         if self._definition is False:
             self.exc('{name} must not be there')
 
diff --git a/fastjsonschema/generator.py b/fastjsonschema/generator.py
index f2d8ca0..a7f96c5 100644
--- a/fastjsonschema/generator.py
+++ b/fastjsonschema/generator.py
@@ -242,7 +242,7 @@ def l(self, line, *args, **kwds):
                 name = name + '".format(**locals()) + "'
 
         context = dict(
-            self._definition or {},
+            self._definition if self._definition and self._definition is not True else {},
             variable=self._variable,
             name=name,
             **kwds
diff --git a/tests/test_boolean_schema.py b/tests/test_boolean_schema.py
new file mode 100644
index 0000000..9d4a228
--- /dev/null
+++ b/tests/test_boolean_schema.py
@@ -0,0 +1,73 @@
+import pytest
+
+from fastjsonschema import JsonSchemaValueException
+
+
+BASE_SCHEMA = {
+    '$schema': 'http://json-schema.org/draft-07/schema',
+    "if": {
+        "const": 1
+    },
+}
+
+
+@pytest.mark.parametrize('value, expected', [
+    (1, 1),
+    (2, 2),
+])
+def test_boolean_schema_true_in_then(asserter, value, expected):
+    asserter({
+        **BASE_SCHEMA,
+        'then': True,
+        'else': {
+            'type': 'number'
+        },
+    }, value, expected)
+
+
+@pytest.mark.parametrize('value, expected', [
+    (1, JsonSchemaValueException(
+        'data must not be there', value=1, name='data',
+        definition=False, rule=None
+    )),
+    (2, 2),
+])
+def test_boolean_schema_false_in_then(asserter, value, expected):
+    asserter({
+        **BASE_SCHEMA,
+        'then': False,
+        'else': {
+            'type': 'number'
+        },
+    }, value, expected)
+
+
+@pytest.mark.parametrize('value, expected', [
+    (1, 1),
+    (2, 2),
+])
+def test_boolean_schema_true_in_else(asserter, value, expected):
+    asserter({
+        **BASE_SCHEMA,
+        'then': {
+            'type': 'number',
+        },
+        'else': True,
+    }, value, expected)
+
+
+@pytest.mark.parametrize('value, expected', [
+    (1, 1),
+    (2, JsonSchemaValueException(
+        'data must not be there', value=2, name='data',
+        definition=False, rule=None
+    )),
+])
+def test_boolean_schema_false_in_else(asserter, value, expected):
+    asserter({
+        **BASE_SCHEMA,
+        'then': {
+            'type': 'number',
+        },
+        'else': False,
+    }, value, expected)