diff --git a/util/inteltool/cpu.c b/util/inteltool/cpu.c
index ff69b8cf69..d2c8ede2ca 100644
--- a/util/inteltool/cpu.c
+++ b/util/inteltool/cpu.c
@@ -110,7 +110,7 @@ static msr_t rdmsr(int addr)
 
 static int open_and_seek(int cpu, unsigned long msr, int mode, int *fd)
 {
-	char dev[512];
+	char dev[32];
 	char temp_string[50];
 
 	snprintf(dev, sizeof(dev), "/dev/cpu/%d/msr", cpu);