diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index 7ba43994..3bad9975 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -113,7 +113,7 @@ int sigar_os_open(sigar_t **sigar)
     ptr = sigar_skip_token(ptr);
     (*sigar)->boot_time = sigar_strtoul(ptr);
 
-    (*sigar)->ticks = 100; /* HZ */
+    (*sigar)->ticks = sysconf(_SC_CLK_TCK);
 
     (*sigar)->ram = -1;