diff --git a/lib/secure-streams/system/auth-sigv4/sign.c b/lib/secure-streams/system/auth-sigv4/sign.c
index a85fa0dcb..b1c2bf2a0 100644
--- a/lib/secure-streams/system/auth-sigv4/sign.c
+++ b/lib/secure-streams/system/auth-sigv4/sign.c
@@ -459,7 +459,7 @@ lws_ss_sigv4_set_aws_key(struct lws_context* context, uint8_t idx,
 
 #if defined(__linux__) || defined(__APPLE__) || defined(WIN32) || \
 	defined(__FreeBSD__) || defined(__NetBSD__) || defined(__ANDROID__) || \
-	defined(__sun)
+	defined(__sun) || defined(__OpenBSD__)
 
 /* ie, if we have filesystem ops */