diff --git a/src/testlib/3rdparty/cycle/cycle_p.h b/src/testlib/3rdparty/cycle/cycle_p.h
index 6750b25d42..52d80d4b97 100644
--- a/src/testlib/3rdparty/cycle/cycle_p.h
+++ b/src/testlib/3rdparty/cycle/cycle_p.h
@@ -76,6 +76,9 @@
    dnl ---------------------------------------------------------------------
 */
 
+#ifndef QBENCHLIB_CYCLE_H
+#define QBENCHLIB_CYCLE_H
+
 /***************************************************************************/
 
 #if TIME_WITH_SYS_TIME
@@ -562,3 +565,5 @@ static inline ticks getticks(void)
 INLINE_ELAPSED(inline)
 #define HAVE_TICK_COUNTER
 #endif
+
+#endif // QBENCHLIB_CYCLE_H