diff --git a/plugins/common.h.in b/plugins/common.h.in
index 09df00dd..56d53761 100644
--- a/plugins/common.h.in
+++ b/plugins/common.h.in
@@ -62,6 +62,10 @@
 #include <sys/types.h>
 #endif
 
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
 #ifdef HAVE_SIGNAL_H
 #include <signal.h>
 #endif