diff --git a/vlib/http/openssl_backend.v b/vlib/http/openssl_backend.v
index b57f640e62..a2afe195e7 100644
--- a/vlib/http/openssl_backend.v
+++ b/vlib/http/openssl_backend.v
@@ -6,7 +6,7 @@ module http
 
 import strings 
 
-#flag -I @VROOT/thirdparty/openssl/include 
+#flag windows -I @VROOT/thirdparty/openssl/include 
 #flag -lssl -lcrypto
 // MacPorts
 #flag darwin -L/opt/local/lib