--- plugin/auth_socket/CMakeLists.txt.orig	Thu Feb 14 21:45:44 2013
+++ plugin/auth_socket/CMakeLists.txt	Thu Feb 14 21:46:51 2013
@@ -20,8 +20,16 @@ CHECK_CXX_SOURCE_COMPILES(
 int main() {
   struct ucred cred;
   getsockopt(0, SOL_SOCKET, SO_PEERCRED, &cred, 0);
-}" HAVE_PEERCRED)
+}" HAVE_PEERCRED_UCRED)
 
-IF(HAVE_PEERCRED)
+CHECK_CXX_SOURCE_COMPILES(
+"#include <sys/types.h>
+#include <sys/socket.h>
+int main() {
+  struct sockpeercred cred;
+  getsockopt(0, SOL_SOCKET, SO_PEERCRED, &cred, 0);
+}" HAVE_PEERCRED_SOCKPEERCRED)
+
+IF(HAVE_PEERCRED_UCRED OR HAVE_PEERCRED_SOCKPEERCRED)
   MYSQL_ADD_PLUGIN(auth_socket auth_socket.c MODULE_ONLY)
 ENDIF()