diff --git a/libs/xmlrpc-c/include/xmlrpc-c/util_int.h b/libs/xmlrpc-c/include/xmlrpc-c/util_int.h
index db5c5e9114..5596eed244 100644
--- a/libs/xmlrpc-c/include/xmlrpc-c/util_int.h
+++ b/libs/xmlrpc-c/include/xmlrpc-c/util_int.h
@@ -12,8 +12,12 @@
 
 #include "util.h"
 
+#ifndef MIN
 #define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
+#endif
 
 /* When we deallocate a pointer in a struct, we often replace it with
 ** this and throw in a few assertions here and there. */