diff --git a/src/MultiPlayer/multiplayrxmgr.cxx b/src/MultiPlayer/multiplayrxmgr.cxx
index 7fc34a806..28d38e293 100644
--- a/src/MultiPlayer/multiplayrxmgr.cxx
+++ b/src/MultiPlayer/multiplayrxmgr.cxx
@@ -50,6 +50,7 @@
 *
 ******************************************************************/
 
+#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
diff --git a/src/MultiPlayer/multiplaytxmgr.cxx b/src/MultiPlayer/multiplaytxmgr.cxx
index 8a8256b23..59a8991ca 100644
--- a/src/MultiPlayer/multiplaytxmgr.cxx
+++ b/src/MultiPlayer/multiplaytxmgr.cxx
@@ -30,6 +30,7 @@
 *
 ******************************************************************/
 
+#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>