diff --git a/regressions/common.h b/regressions/common.h
index 6617d74..d420595 100644
--- a/regressions/common.h
+++ b/regressions/common.h
@@ -119,7 +119,7 @@ rdtsc(void)
                                 : "%eax", "%ebx", "%ecx", "%edx", "memory");
 
         return (((uint64_t)edx << 32) | eax);
-#endif /* !HAVE_RDTSCP */
+#endif /* !CK_MD_RDTSCP */
 #elif defined(__sparcv9__)
         uint64_t r;