diff --git a/CMakeLists.txt b/CMakeLists.txt
index 00b9b25..41b59b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,10 +16,6 @@ endif()
 
 if (LUA_VERSION MATCHES "luajit")
   add_subdirectory(src/lualib/luajit)
-  set(LUAJIT_VERSION true)
 else()
   add_subdirectory(src/lualib/lua)
-  set(LUAJIT_VERSION false)
 endif()
-
-set_target_properties(lualib PROPERTIES INTERFACE_COMPILE_DEFINITIONS LUAJIT_VERSION)
diff --git a/src/lualib/luajit/CMakeLists.txt b/src/lualib/luajit/CMakeLists.txt
index f0b184e..1530f3e 100644
--- a/src/lualib/luajit/CMakeLists.txt
+++ b/src/lualib/luajit/CMakeLists.txt
@@ -60,6 +60,7 @@ if (WIN32)
     PROPERTIES
     IMPORTED_LOCATION ${LUA_BIN_FOLDER}/src/lua51.lib
     INTERFACE_INCLUDE_DIRECTORIES "${LUA_SRC_FOLDER}/src"
+    INTERFACE_COMPILE_DEFINITIONS "LUAJIT_VERSION=1"
     )
 
     # install generated files
@@ -92,6 +93,7 @@ if (WIN32)
     IMPORTED_LOCATION ${LUA_BIN_FOLDER}/src/lua51.dll
     IMPORTED_IMPLIB ${LUA_BIN_FOLDER}/src/lua51.lib
     INTERFACE_INCLUDE_DIRECTORIES "${LUA_SRC_FOLDER}/src"
+    INTERFACE_COMPILE_DEFINITIONS "LUAJIT_VERSION=1"
     )
 
     # install generated files
@@ -147,6 +149,7 @@ if (UNIX OR APPLE)
   PROPERTIES
   # IMPORTED_LOCATION ${LUAJIT_LIB_PATH} # cmake bullshit. spent days figuring this and turns out set_target_properties does squat shit while set_property works fine.
   INTERFACE_INCLUDE_DIRECTORIES "${LUA_SRC_FOLDER}/src"
+  INTERFACE_COMPILE_DEFINITIONS "LUAJIT_VERSION=1"
   )
   set_property(TARGET lualib PROPERTY IMPORTED_LOCATION ${LUAJIT_LIB_PATH})
 
@@ -154,3 +157,4 @@ if (UNIX OR APPLE)
   install(DIRECTORY ${LUA_INSTALL_PATH}/ DESTINATION ${CMAKE_INSTALL_PREFIX})
 endif()
 
+