diff --git a/checkin_notes b/checkin_notes
index 61490674ef..1dcb76fe71 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -6518,7 +6518,9 @@ Rom    12 May 2005
         win_screensaver.cpp
         
 Charlie    13 may 2005
-	Mac: Update build instructions.
-
+	Mac: Update build instructions. 
+        Fix compile error.
+    client/
+        main.C
     mac_build/
         HowToBuildBOINC_XCode.rtf
diff --git a/client/main.C b/client/main.C
index 5fd0a95239..c288788156 100644
--- a/client/main.C
+++ b/client/main.C
@@ -33,6 +33,7 @@ typedef void (CALLBACK* IdleTrackerTerm)();
 #else
 #include "config.h"
 #ifdef HAVE_SYS_SOCKET_H
+#include <sys/types.h>
 #include <sys/socket.h>
 #endif
 #include <unistd.h>