--- a/media/gmp-clearkey/0.1/VideoDecoder.cpp
+++ b/media/gmp-clearkey/0.1/VideoDecoder.cpp
@@ -32,17 +32,23 @@ VideoDecoder::VideoDecoder(Host_8 *aHost
 {
   CK_LOGD("VideoDecoder created");
 
   // We drop the ref in DecodingComplete().
   AddRef();
 
   mDecoder = new WMFH264Decoder();
 
+  // MinGW Does not support std::thread (See #1349912)
+#ifdef __MINGW32__
+  uint32_t cores = 1u;
+#else
   uint32_t cores = std::max(1u, std::thread::hardware_concurrency());
+#endif
+
   HRESULT hr = mDecoder->Init(cores);
 }
 
 VideoDecoder::~VideoDecoder()
 {
   CK_LOGD("VideoDecoder destroyed");
 }