diff --git a/src/dbus_fast/_private/unmarshaller.pxd b/src/dbus_fast/_private/unmarshaller.pxd
index a8feb0d..cc78ec7 100644
--- a/src/dbus_fast/_private/unmarshaller.pxd
+++ b/src/dbus_fast/_private/unmarshaller.pxd
@@ -109,6 +109,9 @@ cdef unsigned int TOKEN_LEFT_PAREN_AS_INT
 cdef object MARSHALL_STREAM_END_ERROR
 cdef object DEFAULT_BUFFER_SIZE
 
+cdef Variant VARIANT_BOOL_TRUE
+cdef Variant VARIANT_BOOL_FALSE
+
 cdef list _EMPTY_HEADERS
 
 cdef cython.uint EAGAIN
@@ -178,7 +181,7 @@ cdef class Unmarshaller:
 
     cpdef read_boolean(self, SignatureType type_)
 
-    cdef _read_boolean(self)
+    cdef bint _read_boolean(self)
 
     cpdef read_uint32_unpack(self, SignatureType type_)
 
diff --git a/src/dbus_fast/_private/unmarshaller.py b/src/dbus_fast/_private/unmarshaller.py
index 0f400f1..ee272e4 100644
--- a/src/dbus_fast/_private/unmarshaller.py
+++ b/src/dbus_fast/_private/unmarshaller.py
@@ -120,6 +120,10 @@ TOKEN_LEFT_CURLY_AS_INT = ord("{")
 TOKEN_LEFT_PAREN_AS_INT = ord("(")
 
 
+VARIANT_BOOL_TRUE = Variant._factory(SIGNATURE_TREE_B, True)
+VARIANT_BOOL_FALSE = Variant._factory(SIGNATURE_TREE_B, False)
+
+
 ARRAY = array.array
 SOL_SOCKET = socket.SOL_SOCKET
 SCM_RIGHTS = socket.SCM_RIGHTS
@@ -539,7 +543,7 @@ class Unmarshaller:
             if token_as_int == TOKEN_S_AS_INT:
                 return Variant._factory(SIGNATURE_TREE_S, self._read_string_unpack())
             if token_as_int == TOKEN_B_AS_INT:
-                return Variant._factory(SIGNATURE_TREE_B, self._read_boolean())
+                return VARIANT_BOOL_TRUE if self._read_boolean() else VARIANT_BOOL_FALSE
             if token_as_int == TOKEN_O_AS_INT:
                 return Variant._factory(SIGNATURE_TREE_O, self._read_string_unpack())
             if token_as_int == TOKEN_U_AS_INT: