diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91a4ba8..10a3f4d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -624,11 +624,12 @@ endif()
 
 if(WEBP_BUILD_WEBP_JS)
   # wasm2js does not support SIMD.
+  find_package(SDL REQUIRED)
   if(NOT WEBP_ENABLE_SIMD)
     # JavaScript version
     add_executable(webp_js ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)
-    target_link_libraries(webp_js webpdecoder SDL)
-    target_include_directories(webp_js PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+    target_link_libraries(webp_js webpdecoder ${SDL_LIBRARY})
+    target_include_directories(webp_js PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${SDL_INCLUDE_DIR})
     set(WEBP_HAVE_SDL 1)
     set_target_properties(
       webp_js
@@ -641,14 +642,14 @@ if(WEBP_BUILD_WEBP_JS)
 
   # WASM version
   add_executable(webp_wasm ${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)
-  target_link_libraries(webp_wasm webpdecoder SDL)
-  target_include_directories(webp_wasm PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+  target_link_libraries(webp_wasm webpdecoder ${SDL_LIBRARY})
+  target_include_directories(webp_wasm PRIVATE ${CMAKE_CURRENT_BINARY_DIR} ${SDL_INCLUDE_DIR})
   set_target_properties(
     webp_wasm
     PROPERTIES LINK_FLAGS "-s WASM=1 \
        -s EXPORTED_FUNCTIONS='[\"_WebpToSDL\"]' -s INVOKE_RUN=0 \
        -s EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")
-  target_compile_definitions(webp_wasm PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)
+  target_compile_definitions(webp_wasm PUBLIC EMSCRIPTEN WEBP_HAVE_SDL WEBP_HAVE_JUST_SDL_H)
 
   target_compile_definitions(webpdspdecode PUBLIC EMSCRIPTEN)
 endif()