diff --git a/lib/cmock_generator_utils.rb b/lib/cmock_generator_utils.rb
index 777e6e4e..83e762fe 100644
--- a/lib/cmock_generator_utils.rb
+++ b/lib/cmock_generator_utils.rb
@@ -76,7 +76,7 @@ def code_assign_argument_quickly(dest, arg)
     else
       assert_expr = "sizeof(#{arg[:name]}) == sizeof(#{arg[:type]}) ? 1 : -1"
       comment = "/* add #{arg[:type]} to :treat_as_array if this causes an error */"
-      "  memcpy((void*)(&#{dest}), (void*)(&#{arg[:name]}),\n" \
+      "  memcpy((void*)(&#{dest}), (const void*)(&#{arg[:name]}),\n" \
         "         sizeof(#{arg[:type]}[#{assert_expr}])); #{comment}\n"
     end
   end
diff --git a/test/unit/cmock_generator_utils_test.rb b/test/unit/cmock_generator_utils_test.rb
index 17fa061f..561b3a45 100644
--- a/test/unit/cmock_generator_utils_test.rb
+++ b/test/unit/cmock_generator_utils_test.rb
@@ -109,7 +109,7 @@
     expected3 = "  cmock_call_instance->Expected_Kiwi = Kiwi;\n"
 
     arg4 = { :name => "Lime", :const? => false, :type => 'LIME_T', :ptr? => false }
-    expected4 = "  memcpy((void*)(&cmock_call_instance->Expected_Lime), (void*)(&Lime),\n" +
+    expected4 = "  memcpy((void*)(&cmock_call_instance->Expected_Lime), (const void*)(&Lime),\n" +
                 "         sizeof(LIME_T[sizeof(Lime) == sizeof(LIME_T) ? 1 : -1])); /* add LIME_T to :treat_as_array if this causes an error */\n"
 
     assert_equal(expected1, @cmock_generator_utils_simple.code_add_an_arg_expectation(arg1))
@@ -135,7 +135,7 @@
                 "  cmock_call_instance->ReturnThruPtr_Kiwi_Used = 0;\n"
 
     arg4 = { :name => "Lime", :const? => false, :type => 'LIME_T', :ptr? => false }
-    expected4 = "  memcpy((void*)(&cmock_call_instance->Expected_Lime), (void*)(&Lime),\n" +
+    expected4 = "  memcpy((void*)(&cmock_call_instance->Expected_Lime), (const void*)(&Lime),\n" +
                 "         sizeof(LIME_T[sizeof(Lime) == sizeof(LIME_T) ? 1 : -1])); /* add LIME_T to :treat_as_array if this causes an error */\n" +
                 "  cmock_call_instance->IgnoreArg_Lime = 0;\n"
 
@@ -159,7 +159,7 @@
     expected = "void CMockExpectParameters_Melon(CMOCK_Melon_CALL_INSTANCE* cmock_call_instance, stuff);\n" +
                "void CMockExpectParameters_Melon(CMOCK_Melon_CALL_INSTANCE* cmock_call_instance, stuff)\n{\n" +
                "  cmock_call_instance->Expected_MyIntPtr = MyIntPtr;\n" +
-               "  memcpy((void*)(&cmock_call_instance->Expected_MyMyType), (void*)(&MyMyType),\n" +
+               "  memcpy((void*)(&cmock_call_instance->Expected_MyMyType), (const void*)(&MyMyType),\n" +
                "         sizeof(MY_TYPE[sizeof(MyMyType) == sizeof(MY_TYPE) ? 1 : -1])); /* add MY_TYPE to :treat_as_array if this causes an error */\n" +
                "  cmock_call_instance->Expected_MyStr = MyStr;\n" +
                "}\n\n"
@@ -177,7 +177,7 @@
                "  cmock_call_instance->Expected_MyIntPtr_Depth = MyIntPtr_Depth;\n" +
                "  cmock_call_instance->IgnoreArg_MyIntPtr = 0;\n" +
                "  cmock_call_instance->ReturnThruPtr_MyIntPtr_Used = 0;\n" +
-               "  memcpy((void*)(&cmock_call_instance->Expected_MyMyType), (void*)(&MyMyType),\n" +
+               "  memcpy((void*)(&cmock_call_instance->Expected_MyMyType), (const void*)(&MyMyType),\n" +
                "         sizeof(MY_TYPE[sizeof(MyMyType) == sizeof(MY_TYPE) ? 1 : -1])); /* add MY_TYPE to :treat_as_array if this causes an error */\n" +
                "  cmock_call_instance->IgnoreArg_MyMyType = 0;\n" +
                "  cmock_call_instance->Expected_MyStr = MyStr;\n" +