diff --git a/tiny_gltf.h b/tiny_gltf.h
index e2eb2ff..5f8d328 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -1087,20 +1087,16 @@ class TinyGLTF {
 #endif
 
 #ifndef TINYGLTF_NO_STB_IMAGE
-#ifndef STB_IMAGE_IMPLEMENTATION
 #ifndef TINYGLTF_BYPASS_INCLUDE_STB_IMAGE
 #include "stb_image.h"
 #endif
 #endif
-#endif
 
 #ifndef TINYGLTF_NO_STB_IMAGE_WRITE
-#ifndef STB_IMAGE_WRITE_IMPLEMENTATION
 #ifndef TINYGLTF_BYPASS_INCLUDE_STB_IMAGE
 #include "stb_image_write.h"
 #endif
 #endif
-#endif
 
 #ifdef __clang__
 #pragma clang diagnostic pop