diff --git a/tools/perf/arch/x86/util/event.c b/tools/perf/arch/x86/util/event.c
index e670f3547581..55ff6aec10fd 100644
--- a/tools/perf/arch/x86/util/event.c
+++ b/tools/perf/arch/x86/util/event.c
@@ -2,6 +2,7 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/zalloc.h>
+#include <stdlib.h>
 
 #include "../../../util/event.h"
 #include "../../../util/synthetic-events.h"
diff --git a/tools/perf/arch/x86/util/tsc.c b/tools/perf/arch/x86/util/tsc.c
index eb2b5195bd02..9b99f48b923c 100644
--- a/tools/perf/arch/x86/util/tsc.c
+++ b/tools/perf/arch/x86/util/tsc.c
@@ -2,6 +2,7 @@
 #include <linux/types.h>
 #include <math.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "../../../util/debug.h"
 #include "../../../util/tsc.h"