diff --git a/ext/mysqlnd/mysqlnd_portability.h b/ext/mysqlnd/mysqlnd_portability.h
index b2334182b94..9dba7fa5152 100644
--- a/ext/mysqlnd/mysqlnd_portability.h
+++ b/ext/mysqlnd/mysqlnd_portability.h
@@ -199,6 +199,11 @@ typedef unsigned long long uint64_t;
 #define MYSQLND_LLU_SPEC "%llu"
 #endif
 
+#ifdef _AIX
+#define MYSQLND_LL_SPEC "%lli"
+#define MYSQLND_LLU_SPEC "%llu"
+#endif
+
 #define MYSQLND_SZ_T_SPEC "%zd"
 #ifndef L64
 #define L64(x) x##LL