--- a/tools/profiler/core/platform-win32.cpp
+++ b/tools/profiler/core/platform-win32.cpp
@@ -27,16 +27,20 @@
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 // OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 // SUCH DAMAGE.
 
 #include <windows.h>
 #include <mmsystem.h>
 #include <process.h>
 
+#ifdef __MINGW32__
+#include <immintrin.h> // for _mm_pause
+#endif
+
 #include "nsWindowsDllInterceptor.h"
 #include "mozilla/StackWalk_windows.h"
 #include "mozilla/WindowsVersion.h"
 
 /* static */ Thread::tid_t
 Thread::GetCurrentId()
 {
   return GetCurrentThreadId();