diff --git a/include/mgba/script/macros.h b/include/mgba/script/macros.h
index 09ef58df0..9ce97f067 100644
--- a/include/mgba/script/macros.h
+++ b/include/mgba/script/macros.h
@@ -403,6 +403,9 @@ CXX_GUARD_START
 	static const struct mScriptValue _mSTStructBindingDefaults_doc_ ## TYPE ## _ ## NAME[mSCRIPT_PARAMS_MAX]; \
 	_mSCRIPT_DECLARE_DOC_STRUCT_METHOD(SCOPE, TYPE, NAME, S, 0, 0, NPARAMS, _mIDENT(_mSTStructBindingDefaults_doc_ ## TYPE ## _ ## NAME), __VA_ARGS__) \
 
+#define mSCRIPT_DEFINE_FUNCTION_BINDING_DEFAULTS(NAME) \
+	static const struct mScriptValue _bindingDefaults_ ## NAME[mSCRIPT_PARAMS_MAX] = {
+
 #define mSCRIPT_DEFINE_STRUCT_BINDING_DEFAULTS(TYPE, NAME) \
 	static const struct mScriptValue _mSTStructBindingDefaults_ ## TYPE ## _ ## NAME[mSCRIPT_PARAMS_MAX] = { \
 		mSCRIPT_NO_DEFAULT,
@@ -449,7 +452,7 @@ CXX_GUARD_START
 
 #define mSCRIPT_DEFINE_END { .type = mSCRIPT_CLASS_INIT_END } } }
 
-#define _mSCRIPT_BIND_FUNCTION(NAME, NRET, RETURN, NPARAMS, ...) \
+#define _mSCRIPT_BIND_FUNCTION(NAME, NRET, RETURN, DEFAULTS, NPARAMS, ...) \
 	static struct mScriptFunction _function_ ## NAME = { \
 		.call = _binding_ ## NAME \
 	}; \
@@ -466,6 +469,7 @@ CXX_GUARD_START
 					.count = NPARAMS, \
 					.entries = { _mCALL(_mIF0_ ## NPARAMS, 0) _mCALL(mSCRIPT_PREFIX_ ## NPARAMS, mSCRIPT_TYPE_MS_, _mEVEN_ ## NPARAMS(__VA_ARGS__)) }, \
 					.names = { _mCALL(_mIF0_ ## NPARAMS, 0) _mCALL(_mCALL_ ## NPARAMS, _mSTRINGIFY, _mODD_ ## NPARAMS(__VA_ARGS__)) }, \
+					.defaults = DEFAULTS, \
 				}, \
 				.returnType = { \
 					.count = NRET, \
@@ -482,7 +486,7 @@ CXX_GUARD_START
 		} \
 	}
 
-#define mSCRIPT_BIND_FUNCTION(NAME, RETURN, FUNCTION, NPARAMS, ...) \
+#define _mSCRIPT_BIND_N_FUNCTION(NAME, RETURN, FUNCTION, DEFAULTS, NPARAMS, ...) \
 	static bool _binding_ ## NAME(struct mScriptFrame* frame, void* ctx) { \
 		UNUSED(ctx); \
 		_mCALL(mSCRIPT_POP_ ## NPARAMS, &frame->arguments, _mEVEN_ ## NPARAMS(__VA_ARGS__)); \
@@ -492,9 +496,9 @@ CXX_GUARD_START
 		_mSCRIPT_CALL(RETURN, FUNCTION, NPARAMS); \
 		return true; \
 	} \
-	_mSCRIPT_BIND_FUNCTION(NAME, 1, mSCRIPT_TYPE_MS_ ## RETURN, NPARAMS, __VA_ARGS__)
+	_mSCRIPT_BIND_FUNCTION(NAME, 1, mSCRIPT_TYPE_MS_ ## RETURN, DEFAULTS, NPARAMS, __VA_ARGS__)
 
-#define mSCRIPT_BIND_VOID_FUNCTION(NAME, FUNCTION, NPARAMS, ...) \
+#define _mSCRIPT_BIND_VOID_FUNCTION(NAME, FUNCTION, DEFAULTS, NPARAMS, ...) \
 	static bool _binding_ ## NAME(struct mScriptFrame* frame, void* ctx) { \
 		UNUSED(ctx); \
 		_mCALL(mSCRIPT_POP_ ## NPARAMS, &frame->arguments, _mEVEN_ ## NPARAMS(__VA_ARGS__)); \
@@ -504,7 +508,21 @@ CXX_GUARD_START
 		_mSCRIPT_CALL_VOID(FUNCTION, NPARAMS); \
 		return true; \
 	} \
-	_mSCRIPT_BIND_FUNCTION(NAME, 0, 0, NPARAMS, __VA_ARGS__)
+	_mSCRIPT_BIND_FUNCTION(NAME, 0, 0, NULL, NPARAMS, __VA_ARGS__)
+
+#define mSCRIPT_BIND_FUNCTION(NAME, RETURN, FUNCTION, NPARAMS, ...) \
+	_mSCRIPT_BIND_N_FUNCTION(NAME, RETURN, FUNCTION, NULL, NPARAMS, __VA_ARGS__)
+
+#define mSCRIPT_BIND_VOID_FUNCTION(NAME, FUNCTION, NPARAMS, ...) \
+	_mSCRIPT_BIND_VOID_FUNCTION(NAME, FUNCTION, NULL, NPARAMS, __VA_ARGS__)
+
+#define mSCRIPT_BIND_FUNCTION_WITH_DEFAULTS(NAME, RETURN, FUNCTION, NPARAMS, ...) \
+	static const struct mScriptValue _bindingDefaults_ ## NAME[mSCRIPT_PARAMS_MAX]; \
+	_mSCRIPT_BIND_N_FUNCTION(NAME, RETURN, FUNCTION, _mIDENT(_bindingDefaults_ ## NAME), NPARAMS, __VA_ARGS__)
+
+#define mSCRIPT_BIND_VOID_FUNCTION_WITH_DEFAULTS(NAME, FUNCTION, NPARAMS, ...) \
+	static const struct mScriptValue _bindingDefaults_ ## _ ## NAME[mSCRIPT_PARAMS_MAX]; \
+	_mSCRIPT_BIND_VOID_FUNCTION(NAME, FUNCTION, _mIDENT(_bindingDefaults_ ## NAME), NPARAMS, __VA_ARGS__)
 
 #define _mSCRIPT_DEFINE_DOC_FUNCTION(SCOPE, NAME, NRET, RETURN, NPARAMS, ...) \
 	static const struct mScriptType _mScriptDocType_ ## NAME = { \
diff --git a/src/script/test/types.c b/src/script/test/types.c
index d5e7834b4..25ec29809 100644
--- a/src/script/test/types.c
+++ b/src/script/test/types.c
@@ -94,6 +94,12 @@ mSCRIPT_BIND_FUNCTION(boundIsHello, S32, isHello, 1, CHARP, str);
 mSCRIPT_BIND_FUNCTION(boundIsSequential, S32, isSequential, 1, LIST, list);
 mSCRIPT_BIND_FUNCTION(boundIsNullCharp, BOOL, isNullCharp, 1, CHARP, arg);
 mSCRIPT_BIND_FUNCTION(boundIsNullStruct, BOOL, isNullStruct, 1, S(Test), arg);
+mSCRIPT_BIND_FUNCTION_WITH_DEFAULTS(boundAddIntWithDefaults, S32, addInts, 2, S32, a, S32, b);
+
+mSCRIPT_DEFINE_FUNCTION_BINDING_DEFAULTS(boundAddIntWithDefaults)
+	mSCRIPT_NO_DEFAULT,
+	mSCRIPT_S32(0)
+mSCRIPT_DEFINE_DEFAULTS_END;
 
 M_TEST_DEFINE(voidArgs) {
 	struct mScriptFrame frame;
@@ -170,6 +176,30 @@ M_TEST_DEFINE(addS32) {
 	mScriptFrameDeinit(&frame);
 }
 
+M_TEST_DEFINE(addS32Defaults) {
+	struct mScriptFrame frame;
+	int32_t val;
+
+	mScriptFrameInit(&frame);
+	mSCRIPT_PUSH(&frame.arguments, S32, 1);
+	mSCRIPT_PUSH(&frame.arguments, S32, 2);
+	assert_true(mScriptInvoke(&boundAddIntWithDefaults, &frame));
+	assert_true(mScriptPopS32(&frame.returnValues, &val));
+	assert_int_equal(val, 3);
+	mScriptFrameDeinit(&frame);
+
+	mScriptFrameInit(&frame);
+	mSCRIPT_PUSH(&frame.arguments, S32, 1);
+	assert_true(mScriptInvoke(&boundAddIntWithDefaults, &frame));
+	assert_true(mScriptPopS32(&frame.returnValues, &val));
+	assert_int_equal(val, 1);
+	mScriptFrameDeinit(&frame);
+
+	mScriptFrameInit(&frame);
+	assert_false(mScriptInvoke(&boundAddIntWithDefaults, &frame));
+	mScriptFrameDeinit(&frame);
+}
+
 M_TEST_DEFINE(subS32) {
 	struct mScriptFrame frame;
 	mScriptFrameInit(&frame);
@@ -1314,6 +1344,7 @@ M_TEST_SUITE_DEFINE(mScript,
 	cmocka_unit_test(identityFunctionF32),
 	cmocka_unit_test(identityFunctionStruct),
 	cmocka_unit_test(addS32),
+	cmocka_unit_test(addS32Defaults),
 	cmocka_unit_test(subS32),
 	cmocka_unit_test(wrongArgCountLo),
 	cmocka_unit_test(wrongArgCountHi),