diff --git a/srcpkgs/openjdk10-bootstrap/patches/xxx-future.patch b/srcpkgs/openjdk10-bootstrap/patches/xxx-future.patch
new file mode 100644
index 00000000000..68329f08848
--- /dev/null
+++ b/srcpkgs/openjdk10-bootstrap/patches/xxx-future.patch
@@ -0,0 +1,13 @@
+--- a/make/jdk/src/classes/build/tools/generatecurrencydata/GenerateCurrencyData.java
++++ b/make/jdk/src/classes/build/tools/generatecurrencydata/GenerateCurrencyData.java
+@@ -284,8 +284,8 @@ public class GenerateCurrencyData {
+             checkCurrencyCode(newCurrency);
+             String timeString = currencyInfo.substring(4, length - 4);
+             long time = format.parse(timeString).getTime();
+-            if (Math.abs(time - System.currentTimeMillis()) > ((long) 10) * 365 * 24 * 60 * 60 * 1000) {
+-                throw new RuntimeException("time is more than 10 years from present: " + time);
++            if (Math.abs(time - System.currentTimeMillis()) > ((long) 50) * 365 * 24 * 60 * 60 * 1000) {
++                throw new RuntimeException("time is more than 50 years from present: " + time);
+             }
+             specialCaseCutOverTimes[specialCaseCount] = time;
+             specialCaseOldCurrencies[specialCaseCount] = oldCurrency;