diff --git a/tests-clar/core/posix.c b/tests-clar/core/posix.c
index 0d9443f92..890e25d47 100644
--- a/tests-clar/core/posix.c
+++ b/tests-clar/core/posix.c
@@ -1,5 +1,7 @@
 #ifndef _WIN32
 # include <arpa/inet.h>
+# include <sys/socket.h>
+# include <netinet/in.h>
 #else
 # include <ws2tcpip.h>
 # ifdef _MSC_VER