diff -ur tz2011j.mod2a/zic.c tz2011j.mod3/zic.c
--- tz2011j.mod2a/zic.c	2011-10-12 09:24:53.000000000 +0100
+++ tz2011j.mod3/zic.c	2011-10-12 21:17:27.000000000 +0100
@@ -2084,11 +2084,11 @@
 		ifree(wp);
 	}
 	if (do_extend) {
-		if (min_year >= INT_MIN + YEARSPERREPEAT)
-			min_year -= YEARSPERREPEAT;
+		if (min_year >= INT_MIN + YEARSPERREPEAT + 2)
+			min_year -= YEARSPERREPEAT + 2;
 		else	min_year = INT_MIN;
-		if (max_year <= INT_MAX - YEARSPERREPEAT)
-			max_year += YEARSPERREPEAT;
+		if (max_year <= INT_MAX - YEARSPERREPEAT - 2)
+			max_year += YEARSPERREPEAT + 2;
 		else	max_year = INT_MAX;
 		/*
 		** Regardless of any of the above,
@@ -2098,7 +2098,7 @@
 		*/
 		if (prodstic) {
 			min_year = 1900;
-			max_year = min_year + YEARSPERREPEAT;
+			max_year = min_year + YEARSPERREPEAT + 2;
 		}
 	}
 	/*