diff --git a/include/mimick.h b/include/mimick.h
index 1b0f994..d1e4f84 100644
--- a/include/mimick.h
+++ b/include/mimick.h
@@ -131,7 +131,7 @@ void mmk_stub_destroy(struct mmk_stub *stub);
 /**
  * Convenience wrapper to get an addressable temporary object from a lvalue.
  */
-# define mmk_val(Type, ...) &(mmk_literal(Type, {( __VA_ARGS__ )}))
+# define mmk_val(Type, ...) &(mmk_literal(Type, {(__VA_ARGS__)}))
 
 /**
  * Defines a mock blueprint and typedef the Id to a function pointer type
diff --git a/include/mimick/literal.h b/include/mimick/literal.h
index e70bfb3..b0bea2c 100644
--- a/include/mimick/literal.h
+++ b/include/mimick/literal.h
@@ -44,7 +44,7 @@ T mmk_literal<T, ID>::storage{0};
 
 template <typename T>
 T & mmk_assign(T & dst, T src) {
-  return dst = std::move(dst);
+  return dst = std::move(src);
 }
 
 template <typename T, size_t N>
@@ -72,7 +72,9 @@ va_list & mmk_assign(va_list & dst, va_list src) {
   mmk_struct_initialize((mmk_literal<type, __COUNTER__>::storage), __VA_ARGS__)
 
 #  define mmk_literal(type, value) \
-  (mmk_assign(mmk_literal<type, __COUNTER__>::storage, value))
+  (mmk_assign(mmk_literal<type, __COUNTER__>::storage, (type) value))
+
+#  define mmk_default_value(type) type{0}
 
 # else /* !defined __cplusplus */
 
@@ -82,6 +84,8 @@ va_list & mmk_assign(va_list & dst, va_list src) {
 
 #  define mmk_struct_literal(type, ...) ((type) { __VA_ARGS__ })
 
+#  define mmk_default_value(type) {0}
+
 # endif
 
 #endif /* !MMK_LITERAL_H_ */
diff --git a/include/mimick/matcher.h b/include/mimick/matcher.h
index bfb6b0e..211090a 100644
--- a/include/mimick/matcher.h
+++ b/include/mimick/matcher.h
@@ -68,7 +68,7 @@ struct mmk_matcher {
 
 # define mmk_matcher_val_(Kind, Type, Val) (mmk_matcher_add(Kind, __COUNTER__), mmk_literal(Type, Val))
 # undef mmk_any
-# define mmk_any(Type)      mmk_matcher_val_(MMK_MATCHER_ANY, Type, { 0 })
+# define mmk_any(Type)      mmk_matcher_val_(MMK_MATCHER_ANY, Type, mmk_default_value(Type))
 # undef mmk_eq
 # define mmk_eq(Type, Val)  mmk_matcher_val_(MMK_MATCHER_EQ, Type, Val)
 # undef mmk_ne
@@ -82,7 +82,7 @@ struct mmk_matcher {
 # undef mmk_ge
 # define mmk_ge(Type, Val) mmk_matcher_val_(MMK_MATCHER_GEQ, Type, Val)
 # undef mmk_that
-# define mmk_that(Type, Predicate) (mmk_matcher_add_fn(MMK_MATCHER_THAT, __COUNTER__, (void(*)(void))(Predicate)), mmk_literal(Type, { 0 }))
+# define mmk_that(Type, Predicate) (mmk_matcher_add_fn(MMK_MATCHER_THAT, __COUNTER__, (void(*)(void))(Predicate)), mmk_literal(Type, mmk_default_value(Type)))
 
 void mmk_matcher_init(int kind);
 void mmk_matcher_add(enum mmk_matcher_kind kind, int counter);
diff --git a/sample/strdup/test.c b/sample/strdup/test.c
index c2211c0..20e2f15 100644
--- a/sample/strdup/test.c
+++ b/sample/strdup/test.c
@@ -35,7 +35,7 @@ void test_error_case(void)
     mmk_assert((mmk_fn) mock != MMK_MOCK_INVALID);
 
     mmk_when(mock(mmk_any(size_t)),
-            .then_return = &(void *) { NULL },
+            .then_return = mmk_val(void *, NULL),
             .then_errno = ENOMEM);
 
     char *dup = my_strdup("foo");