diff --git a/cmake/luajit.cmake b/cmake/luajit.cmake
index b80d9d2205ae5d4d87a37f1c9e1563e187e1b1ab..cea484f7fd40a5af35b6d425410f49d9356c0c22 100644
--- a/cmake/luajit.cmake
+++ b/cmake/luajit.cmake
@@ -144,7 +144,6 @@ macro(luajit_build)
         set (luajit_xcflags ${luajit_xcflags}
             -DLUAJIT_USE_VALGRIND -DLUAJIT_USE_SYSMALLOC)
     endif()
-    set (luajit_copt ${luajit_copt} -I${PROJECT_SOURCE_DIR}/libobjc)
     set (luajit_target_cc "${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS}")
     # Use external unwind on all platforms.
     set (luajit_target_cc "${luajit_target_cc} -DLUAJIT_UNWIND_EXTERNAL=1")