diff --git a/mingw-w64-libraries/winpthreads/include/pthread_time.h b/mingw-w64-libraries/winpthreads/include/pthread_time.h
index ac014ae..27f7566 100644
--- a/mingw-w64-libraries/winpthreads/include/pthread_time.h
+++ b/mingw-w64-libraries/winpthreads/include/pthread_time.h
@@ -23,6 +23,7 @@
 #ifndef WIN_PTHREADS_TIME_H
 #define WIN_PTHREADS_TIME_H
 
+#include <sys/timeb.h>
 #include "pthread_compat.h"
 
 /* Posix timers are supported */
diff --git a/mingw-w64-libraries/winpthreads/include/semaphore.h b/mingw-w64-libraries/winpthreads/include/semaphore.h
index 649583f..9a6c211 100644
--- a/mingw-w64-libraries/winpthreads/include/semaphore.h
+++ b/mingw-w64-libraries/winpthreads/include/semaphore.h
@@ -23,6 +23,7 @@
 #ifndef WIN_PTHREADS_SEMAPHORE_H
 #define WIN_PTHREADS_SEMAPHORE_H
 
+#include <sys/timeb.h>
 #include "pthread_compat.h"
 
 #ifdef __cplusplus