diff --git a/CODING b/CODING
index fe64431579..5d62dbb0b0 100644
--- a/CODING
+++ b/CODING
@@ -296,4 +296,8 @@ libadmin/samples/rxstat_query_process.c : all : util_RPCStatsStateGet types
 libadmin/test/client.c : all         : util_RPCStatsStateGet types
 ubik/ubikclient.c    : strict-protos : ubik_Call
 volser/vol-dump.c    : format        : afs_sfsize_t
-
+rxkad/ticket5.c      : format-truncation : inside included file v5der.c in the
+                                       function _heim_time2generalizedtime, the
+                                       two snprintf calls raise
+                                       format-truncation warnings due to the
+                                       arithmetic on tm_year and tm_mon fields
\ No newline at end of file
diff --git a/src/rxkad/ticket5.c b/src/rxkad/ticket5.c
index 1a59d4fcd1..8c750d3ce7 100644
--- a/src/rxkad/ticket5.c
+++ b/src/rxkad/ticket5.c
@@ -80,7 +80,16 @@
 #include "v5gen-rewrite.h"
 #include "v5gen.h"
 #include "der.h"
+
+#if defined(IGNORE_SOME_GCC_WARNINGS) && !defined(_clang) && __GNUC__ >= 7
+# pragma GCC diagnostic push
+# pragma GCC diagnostic warning "-Wformat-truncation"
+#endif
 #include "v5der.c"
+#if defined(IGNORE_SOME_GCC_WARNINGS) && !defined(__clang__) && __GNUC__ >= 7
+# pragma GCC diagnostic pop
+#endif
+
 #include "v5gen.c"
 
 #define RFC3961_NO_ENUMS