diff --git a/packages/games/libretro/flycast_libretro/patches/RG503/01-platform.patch b/packages/games/libretro/flycast_libretro/patches/RG503/01-platform.patch
index e69de29bb..1bd744da7 100644
--- a/packages/games/libretro/flycast_libretro/patches/RG503/01-platform.patch
+++ b/packages/games/libretro/flycast_libretro/patches/RG503/01-platform.patch
@@ -0,0 +1,43 @@
+diff -rupN flycast.orig/Makefile flycast/Makefile
+--- flycast.orig/Makefile	2022-06-18 13:29:52.675787687 -0400
++++ flycast/Makefile	2022-06-18 13:53:23.564624927 -0400
+@@ -403,26 +403,30 @@ else ifeq ($(platform), arm64_cortex_a53
+ 
+ #######################################
+ 
+-# ARM64 SM1 Odroid C4
+-else ifeq ($(platform), odroidc4)
++# ARM64 RG503, RG353P
++else ifeq ($(platform), RK3566)
+ 	EXT ?= so
+ 	TARGET := $(TARGET_NAME)_libretro.$(EXT)
+ 	SHARED += -shared -Wl,--version-script=link.T
+-	LDFLAGS +=  -Wl,--no-undefined
+ 	fpic = -fPIC
+ 	LIBS += -lrt
+ 	ARM_FLOAT_ABI_HARD = 0
+ 	FORCE_GLES = 1
+ 	SINGLE_PREC_FLAGS = 1
+-	CPUFLAGS += -DHOST_CPU=0x20000006 -DTARGET_LINUX_ARMv8 -frename-registers
+-	CFLAGS += -mcpu=cortex-a55 -mtune=cortex-a55 $(CPUFLAGS)
+-	CXXFLAGS += -mcpu=cortex-a55 -mtune=cortex-a55 $(CPUFLAGS)
+-	ASFLAGS += $(CFLAGS) -c -frename-registers -fno-strict-aliasing -ffast-math -ftree-vectorize
++	HAVE_LTCG = 0
++	HAVE_OPENMP = 0
++	CFLAGS += -Ofast \
++		-fuse-linker-plugin \
++		-fno-stack-protector -fno-ident -fomit-frame-pointer \
++		-fmerge-all-constants -ffast-math -funroll-all-loops \
++		-mcpu=cortex-a55 -mtune=cortex-a55
++	CXXFLAGS += $(CFLAGS)
++	LDFLAGS += -mcpu=cortex-a55 -mtune=cortex-a55 -Ofast -flto -fuse-linker-plugin
+ 	PLATFORM_EXT := unix
++	CORE_DEFINES += -DLOW_END -DLOW_RES
+ 	WITH_DYNAREC=arm64
++	PLATFORM_EXT := unix
+ 	HAVE_GENERIC_JIT = 0
+-	HAVE_VULKAN = 0
+-	HAVE_LTCG = 0
+ 
+ #######################################
+