ebebc2013f0403eb69009df94216a50491be1396
diff --git a/src/c-parse.gperf b/src/c-parse.gperf
--- a/src/c-parse.gperf
+++ b/src/c-parse.gperf
@@ -69,7 +69,7 @@ if, IF, NORID
 inline, SCSPEC, RID_INLINE
 int, TYPESPEC, RID_INT
 long, TYPESPEC, RID_LONG
-offsetof, OFFSETOF, NORID
+__builtin_offsetof, OFFSETOF, NORID
 register, SCSPEC, RID_REGISTER
 return, RETURN, NORID
 short, TYPESPEC, RID_SHORT
