diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1e22bc..f697899 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ set(EXCLUDE_MPQ_SUPPORT FALSE CACHE BOOL "Exclude StormLib and MPQ archive suppo
 if(EXCLUDE_MPQ_SUPPORT)
     add_compile_definitions(EXCLUDE_MPQ_SUPPORT)
 endif()
-option(USE_F3DEX2 "Use F3DEX_GBI_2" OFF)
+option(GBI_UCODE "Specify the GBI ucode version" F3DEX_GBI_2)
 
 # =========== Dependencies =============
 include(cmake/dependencies/common.cmake)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5435811..1123683 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -217,9 +217,7 @@ endif()
 
 #=================== Compile Options & Defs ===================
 
-if(USE_F3DEX2)
-    target_compile_definitions(libultraship PRIVATE F3DEX_GBI_2)
-endif()
+target_compile_definitions(libultraship PRIVATE ${GBI_UCODE})
 
 if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
     target_compile_definitions(${PROJECT_NAME} PRIVATE