diff --git a/generator/src/telethon_generator/_impl/codegen/generator.py b/generator/src/telethon_generator/_impl/codegen/generator.py
index b68b488e..84d2cf8e 100644
--- a/generator/src/telethon_generator/_impl/codegen/generator.py
+++ b/generator/src/telethon_generator/_impl/codegen/generator.py
@@ -10,7 +10,7 @@ from .serde.common import (
     to_class_name,
     to_method_name,
 )
-from .serde.deserialization import generate_read
+from .serde.deserialization import generate_read, param_value_fmt
 from .serde.serialization import generate_function, generate_write
 
 
@@ -125,7 +125,7 @@ def generate(fs: FakeFs, tl: ParsedTl) -> None:
         writer.write(f"  def _read_from(cls, reader: Reader) -> Self:")
         writer.indent(2)
         generate_read(writer, typedef)
-        params = ", ".join(f"{p.name}=_{p.name}" for p in property_params)
+        params = ", ".join(f"{p.name}={param_value_fmt(p)}" for p in property_params)
         writer.write(f"return cls({params})")
         writer.dedent(2)
 
diff --git a/generator/src/telethon_generator/_impl/codegen/serde/deserialization.py b/generator/src/telethon_generator/_impl/codegen/serde/deserialization.py
index 8be53a0b..3c0c7b1d 100644
--- a/generator/src/telethon_generator/_impl/codegen/serde/deserialization.py
+++ b/generator/src/telethon_generator/_impl/codegen/serde/deserialization.py
@@ -107,8 +107,18 @@ def generate_read(writer: SourceWriter, defn: Definition) -> None:
             fmt = "".join(trivial_struct_fmt(param.ty) for param in group)
             size = struct.calcsize(f"<{fmt}")
             writer.write(f"{names}= reader.read_fmt('<{fmt}', {size})")
+            for param in group:
+                if isinstance(param.ty, NormalParameter) and param.ty.ty.name == "Bool":
+                    writer.write(f"assert _{param.name} in (0x997275b5, 0xbc799737)")
         else:
             for param in iter:
                 if not isinstance(param.ty, NormalParameter):
                     raise RuntimeError("FlagsParameter should be considered trivial")
                 generate_normal_param_read(writer, param.name, param.ty, defn.id)
+
+
+def param_value_fmt(param: Parameter) -> str:
+    if isinstance(param.ty, NormalParameter) and param.ty.ty.name == "Bool":
+        return f"_{param.name} == 0x997275b5"
+    else:
+        return f"_{param.name}"
diff --git a/generator/tests/generator_test.py b/generator/tests/generator_test.py
index b4dbd32c..680244ac 100644
--- a/generator/tests/generator_test.py
+++ b/generator/tests/generator_test.py
@@ -100,3 +100,15 @@ def test_object_blob_with_prefix_special_case() -> None:
     )
     result = gen_py_code(typedefs=definitions)
     assert "reader.read(_bytes)" in result
+
+
+def test_bool_mapped_from_int() -> None:
+    definitions = get_definitions(
+        """
+        contact#145ade0b user_id:long mutual:Bool = Contact;
+        """
+    )
+    result = gen_py_code(typedefs=definitions)
+    assert "_mutual in (0x997275b5, 0xbc799737)" in result
+    assert "=_mutual == 0x997275b5" in result
+    assert "0x997275b5 if self.mutual else 0xbc799737" in result