diff -urNp a/include/net-snmp/library/int64.h b/include/net-snmp/library/int64.h
--- a/include/net-snmp/library/int64.h	2018-07-18 14:37:16.543348832 +0200
+++ b/include/net-snmp/library/int64.h	2018-07-18 15:31:31.516999288 +0200
@@ -10,7 +10,7 @@ extern          "C" {
      * Note: using the U64 typedef is deprecated because this typedef conflicts
      * with a typedef with the same name defined in the Perl header files.
      */
-    typedef struct counter64 U64;
+//    typedef struct counter64 U64;
 #endif
 
 #define I64CHARSZ 21
