diff --git a/python_modules/demarshal.py b/python_modules/demarshal.py
index 8d3f5cb..7b53361 100644
--- a/python_modules/demarshal.py
+++ b/python_modules/demarshal.py
@@ -1039,8 +1039,7 @@ def write_msg_parser(writer, message):
     msg_type = message.c_type()
     msg_sizeof = message.sizeof()
 
-    want_mem_size = (len(message.members) != 1 or message.members[0].is_fixed_nw_size()
-                         or not message.members[0].is_array())
+    want_mem_size = not message.has_attr("nocopy")
 
     writer.newline()
     if message.has_attr("ifdef"):
diff --git a/tests/test-marshallers.h b/tests/test-marshallers.h
index 7e5a0b2..7b9f6c5 100644
--- a/tests/test-marshallers.h
+++ b/tests/test-marshallers.h
@@ -8,5 +8,9 @@ typedef struct {
     uint64_t *data;
 } SpiceMsgMainShortDataSubMarshall;
 
+typedef struct {
+    int8_t *name;
+} SpiceMsgMainArrayMessage;
+
 #endif /* _H_TEST_MARSHALLERS */
 
diff --git a/tests/test-marshallers.proto b/tests/test-marshallers.proto
index 68b5822..95d086c 100644
--- a/tests/test-marshallers.proto
+++ b/tests/test-marshallers.proto
@@ -4,6 +4,10 @@ channel TestChannel {
       uint32 data_size;
       uint64 *data[data_size] @marshall;
    } ShortDataSubMarshall;
+
+   message {
+      int8 name[];
+   } ArrayMessage;
 };
 
 protocol Spice {