diff --git a/CMakeLists.txt b/CMakeLists.txt
index c397e32..e004021 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,6 +40,16 @@ endif ()
 if (LEVEL_SIZE STREQUAL "8")
     add_definitions(-DLEVEL_U8)
     message(STATUS "Using level size of 8")
+elseif (LEVEL_SIZE STREQUAL "16")
+    add_definitions(-DLEVEL_U16)
+    message(STATUS "Using level size of 16")
+elseif (LEVEL_SIZE STREQUAL "32")
+    add_definitions(-DLEVEL_U32)
+    message(STATUS "Using level size of 32")
+elseif (LEVEL_SIZE STREQUAL "64")
+    add_definitions(-DLEVEL_U64)
+    message(STATUS "Using level size of 64")
+
 else ()
     message(FATAL_ERROR, "Invalid level size was given.")
 endif ()
diff --git a/src/Defines.hpp b/src/Defines.hpp
index 4bc62e9..cadd391 100644
--- a/src/Defines.hpp
+++ b/src/Defines.hpp
@@ -1,6 +1,17 @@
 #ifndef CREATURELIB_DEFINES_HPP
 #define CREATURELIB_DEFINES_HPP
 
-using level_int_t = int;
+#if LEVEL_U8
+using level_int_t = uint8_t;
+#elif LEVEL_U16
+using level_int_t = uint16_t;
+#elif LEVEL_U32
+using level_int_t = uint32_t;
+#elif LEVEL_U64
+using level_int_t = uint64_t;
+#else
+#warning Level size was not specified, falling back to uint8_t
+using level_int_t = uint8_t;
+#endif
 
 #endif // CREATURELIB_DEFINES_HPP