diff --git a/lzma-sys/config.h b/lzma-sys/config.h
index 9e3e9d69..5d3c5a28 100644
--- a/lzma-sys/config.h
+++ b/lzma-sys/config.h
@@ -39,7 +39,7 @@
     #define MYTHREAD_POSIX 1
 #endif
 
-#if defined(__sun)
+#if defined(__sun) || defined(__FreeBSD__)
     #define HAVE_CLOCK_GETTIME 1
     #define HAVE_DECL_CLOCK_MONOTONIC 1
 #endif