diff --git a/apps/speed.c b/apps/speed.c
index 1d83adccfab6898f8303c19e6d53097a696f07c6..27f2e675cdb9c96da9562b8ec86d22080970ee40 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -208,7 +208,8 @@
 
 /* The following if from times(3) man page.  It may need to be changed */
 #ifndef HZ
-# ifdef _SC_CLK_TCK
+# if defined(_SC_CLK_TCK) \
+     && (!defined(OPENSSL_SYS_VMS) || __CTRL_VER >= 70000000)
 #  define HZ ((double)sysconf(_SC_CLK_TCK))
 # else
 #  ifndef CLK_TCK