diff -r 227718170097 -r ae6706411b24 cmake_modules/FindSDL2.cmake
--- a/cmake_modules/FindSDL2.cmake	Thu Apr 21 00:09:07 2016 -0400
+++ b/cmake_modules/FindSDL2.cmake	Thu Apr 21 00:10:23 2016 -0400
@@ -158,6 +158,11 @@
     SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
 ENDIF(SDL2_LIBRARY_TEMP)
 
+if(BUILD_ENGINE_JS)
+    set(SDL2_LIBRARY "sdl2_emscripten_internal" CACHE STRING "emscripten override" FORCE)
+    set(SDL2_INCLUDE_DIR "${CMAKE_SYSTEM_INCLUDE_PATH}/SDL" CACHE STRING "emscripten override" FORCE)
+endif()
+
 INCLUDE(FindPackageHandleStandardArgs)
 
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)