diff --git a/tiny_gltf.h b/tiny_gltf.h
index 5ba33f2..3572388 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -1599,7 +1599,7 @@ class TinyGLTF {
 
 // issue 143.
 // Define NOMINMAX to avoid min/max defines,
-// but undef it after included windows.h
+// but undef it after included Windows.h
 #ifndef NOMINMAX
 #define TINYGLTF_INTERNAL_NOMINMAX
 #define NOMINMAX
@@ -1609,7 +1609,11 @@ class TinyGLTF {
 #define WIN32_LEAN_AND_MEAN
 #define TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN
 #endif
+#ifndef __MINGW32__
 #include <Windows.h>  // include API for expanding a file path
+#else
+#include <windows.h>
+#endif
 
 #ifdef TINYGLTF_INTERNAL_WIN32_LEAN_AND_MEAN
 #undef WIN32_LEAN_AND_MEAN