diff --git a/deps/hiredis/fmacros.h b/deps/hiredis/fmacros.h
index 14fed60606e005e4168a05dcd3e39dfdc93d6e63..9a56643df71dfd2774c3cb29ec9616a28cdd1b2e 100644
--- a/deps/hiredis/fmacros.h
+++ b/deps/hiredis/fmacros.h
@@ -13,7 +13,7 @@
 #if defined(__sun__)
 #define _POSIX_C_SOURCE 200112L
 #else
-#if !(defined(__APPLE__) && defined(__MACH__))
+#if !(defined(__APPLE__) && defined(__MACH__)) && !(defined(__FreeBSD__))
 #define _XOPEN_SOURCE 600
 #endif
 #endif