diff --git a/src/prim/unix/prim.c b/src/prim/unix/prim.c
index 1efc84dc..a4e012c7 100644
--- a/src/prim/unix/prim.c
+++ b/src/prim/unix/prim.c
@@ -57,7 +57,7 @@ terms of the MIT license. A copy of the license can be found in the file
   #include <sys/sysctl.h>
 #endif
 
-#if defined(__linux__)
+#if defined(__linux__) || defined(__FreeBSD__)
   #define MI_HAS_SYSCALL_H
   #include <sys/syscall.h>
 #endif