diff --git a/TOOLS/fastmemcpybench.c b/TOOLS/fastmemcpybench.c
index 36b9012d31..82a89f0454 100644
--- a/TOOLS/fastmemcpybench.c
+++ b/TOOLS/fastmemcpybench.c
@@ -15,6 +15,7 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/time.h>
+#include <inttypes.h>
 
 #include "../libvo/fastmemcpy.h"