diff --git a/libcacard/vscclient.c b/libcacard/vscclient.c
index ab9b2b82d67f1cb7e023c837f984024130f2456d..80111df00c238150219fe58534582bec4a15657f 100644
--- a/libcacard/vscclient.c
+++ b/libcacard/vscclient.c
@@ -11,6 +11,8 @@
  */
 
 #ifndef _WIN32
+#include <sys/socket.h>
+#include <netinet/in.h>
 #include <netdb.h>
 #define closesocket(x) close(x)
 #endif