diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0cd6cfd..bb535bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@ option(SHARED "Whether we should build a shared library, instead of a static one
 option(TESTS "Whether the test executable should be build as well." OFF)
 option(STATICC "Whether gcc and stdc++ should be linked statically to the library." OFF)
 set(SCRIPT_PROVIDER "angelscript" CACHE STRING "Which script provider to use.")
-set(LEVEL_SIZE "8" CACHE STRING "Number of bits to store the level as. Can be 8, 16, 32, or 64")
+set(LEVEL_SIZE "8" CACHE STRING "Number of bits to store the level as. Can be 8")
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     add_compile_options(-fconcepts)
@@ -36,12 +36,6 @@ message(STATUS "Using:
 
 if (LEVEL_SIZE STREQUAL "8")
     add_definitions(-DLEVEL_U8)
-elseif (LEVEL_SIZE STREQUAL "16")
-    add_definitions(-DLEVEL_U16)
-elseif (LEVEL_SIZE STREQUAL "32")
-    add_definitions(-DLEVEL_U32)
-elseif (LEVEL_SIZE STREQUAL "64")
-    add_definitions(-DLEVEL_U64)
 else ()
     message(FATAL_ERROR, "Invalid level size was given.")
 endif ()