diff --git a/src/platform/wii/CMakeLists.txt b/src/platform/wii/CMakeLists.txt
index b72ac2d5c..165dba60b 100644
--- a/src/platform/wii/CMakeLists.txt
+++ b/src/platform/wii/CMakeLists.txt
@@ -3,7 +3,7 @@ find_program(GXTEXCONV gxtexconv)
 find_program(RAW2C raw2c)
 find_program(WIILOAD wiiload)
 
-set(OS_DEFINES COLOR_16_BIT COLOR_5_6_5 USE_VFS_FILE IOAPI_NO_64)
+set(OS_DEFINES COLOR_16_BIT COLOR_5_6_5 USE_VFS_FILE IOAPI_NO_64 FIXED_ROM_BUFFER)
 list(APPEND CORE_VFS_SRC ${CMAKE_SOURCE_DIR}/src/util/vfs/vfs-file.c ${CMAKE_SOURCE_DIR}/src/util/vfs/vfs-dirent.c ${CMAKE_SOURCE_DIR}/src/util/vfs/vfs-devlist.c)
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
diff --git a/src/platform/wii/main.c b/src/platform/wii/main.c
index 6a359a637..ef0c3f84c 100644
--- a/src/platform/wii/main.c
+++ b/src/platform/wii/main.c
@@ -253,7 +253,8 @@ int main(int argc, char* argv[]) {
 	memset(audioBuffer, 0, sizeof(audioBuffer));
 #ifdef FIXED_ROM_BUFFER
 	romBufferSize = SIZE_CART0;
-	romBuffer = anonymousMemoryMap(romBufferSize);
+	romBuffer = SYS_GetArena2Lo();
+	SYS_SetArena2Lo((void*)((intptr_t) romBuffer + SIZE_CART0));
 #endif
 
 #if !defined(COLOR_16_BIT) && !defined(COLOR_5_6_5)
@@ -530,10 +531,6 @@ int main(int argc, char* argv[]) {
 	VIDEO_WaitVSync();
 	mGUIDeinit(&runner);
 
-#ifdef FIXED_ROM_BUFFER
-	mappedMemoryFree(romBuffer, romBufferSize);
-#endif
-
 	free(fifo);
 	free(texmem);
 	free(rescaleTexmem);