diff --git a/docs/spice_protocol.txt b/docs/spice_protocol.txt
index 18b636f..421393d 100644
--- a/docs/spice_protocol.txt
+++ b/docs/spice_protocol.txt
@@ -454,9 +454,3 @@ virtual
 ~~~~~~~
 
 TODO
-
-fixedsize
-~~~~~~~~~
-
-TODO
-
diff --git a/python_modules/demarshal.py b/python_modules/demarshal.py
index 541137e..5209272 100644
--- a/python_modules/demarshal.py
+++ b/python_modules/demarshal.py
@@ -729,10 +729,6 @@ def write_switch_parser(writer, container, switch, dest, scope):
     var = container.lookup_member(switch.variable)
     var_type = var.member_type
 
-    if switch.has_attr("fixedsize"):
-        scope.variable_def("uint8_t *", "in_save")
-        writer.assign("in_save", "in")
-
     first = True
     for c in switch.cases:
         check = c.get_check(dest.get_ref(switch.variable), var_type)
@@ -775,9 +771,6 @@ def write_switch_parser(writer, container, switch, dest, scope):
 
     writer.newline()
 
-    if switch.has_attr("fixedsize"):
-        writer.assign("in", "in_save + %s" % switch.get_fixed_nw_size())
-
 def write_parse_ptr_function(writer, target_type):
     if target_type.is_array():
         parse_function = "parse_array_%s" % target_type.element_type.primitive_type()
diff --git a/python_modules/marshal.py b/python_modules/marshal.py
index 940c925..4e98993 100644
--- a/python_modules/marshal.py
+++ b/python_modules/marshal.py
@@ -289,15 +289,7 @@ def write_switch_marshaller(writer, container, switch, src, scope):
             else:
                 writer.todo("Can't handle type %s" % m.member_type)
 
-            if switch.has_attr("fixedsize"):
-                remaining = switch.get_fixed_nw_size() - t.get_fixed_nw_size()
-                if remaining != 0:
-                    writer.statement("spice_marshaller_reserve_space(m, %s)" % remaining)
-
         first = False
-    if switch.has_attr("fixedsize"):
-        with writer.block(" else"):
-            writer.statement("spice_marshaller_reserve_space(m, %s)" % switch.get_fixed_nw_size())
 
     writer.newline()
 
diff --git a/python_modules/ptypes.py b/python_modules/ptypes.py
index 4b74225..f39f044 100644
--- a/python_modules/ptypes.py
+++ b/python_modules/ptypes.py
@@ -111,9 +111,6 @@ valid_attributes=set([
     'minor',
     # this attribute does not exist on the network, fill just structure with the value
     'virtual',
-    # for a switch this indicates that on network
-    # it will occupy always the same size (maximum size required for all members)
-    'fixedsize',
 ])
 
 attributes_with_arguments=set([
@@ -737,9 +734,6 @@ class Switch(Containee):
         return True
 
     def is_fixed_nw_size(self):
-        if self.has_attr("fixedsize"):
-            return True
-
         size = None
         has_default = False
         for c in self.cases: