diff --git a/cputree.c b/cputree.c
index 791b0bc..c195ec9 100644
--- a/cputree.c
+++ b/cputree.c
@@ -321,7 +321,7 @@ static void do_one_cpu(char *path)
 
 	cpu->number = strtoul(&path[27], NULL, 10);
 
-	cpu->max_load = SLEEP_INTERVAL * 1000 * 1000; // SLEEP_INTERVAL in nanoseconds, should be a good enough approximation
+	cpu->max_load = SLEEP_INTERVAL * 1000 * 1000 * 1000; // SLEEP_INTERVAL in nanoseconds, should be a good enough approximation
 
 	cpu_set(cpu->number, cpu_online_map);