diff --git a/common/timer.c b/common/timer.c
index 8538635218..4fa2e6b93b 100644
--- a/common/timer.c
+++ b/common/timer.c
@@ -184,6 +184,11 @@ timestamp_t get_time(void)
 	return ts;
 }
 
+clock_t clock(void)
+{
+	return (clock_t) __hw_clock_source_read();
+}
+
 void force_time(timestamp_t ts)
 {
 	clksrc_high = ts.le.hi;
diff --git a/include/timer.h b/include/timer.h
index ddeb79a318..2c439e959e 100644
--- a/include/timer.h
+++ b/include/timer.h
@@ -8,6 +8,8 @@
 #ifndef __CROS_EC_TIMER_H
 #define __CROS_EC_TIMER_H
 
+#include <sys/types.h>
+
 #include "common.h"
 #include "task_id.h"
 
@@ -146,4 +148,11 @@ static inline unsigned time_since32(timestamp_t start)
 	return get_time().le.lo - start.le.lo;
 }
 
+/**
+ * Returns a free running high resolution (ten us or better) clock.
+ *
+ * Used by third party libraries requiring MSDN services.
+ */
+clock_t clock(void);
+
 #endif  /* __CROS_EC_TIMER_H */