diff --git a/ORE-SWIG/QuantLib-SWIG b/ORE-SWIG/QuantLib-SWIG
index 9b1d648856..18203bf0af 160000
--- a/ORE-SWIG/QuantLib-SWIG
+++ b/ORE-SWIG/QuantLib-SWIG
@@ -1 +1 @@
-Subproject commit 9b1d6488567f1cc84ab55d4c08cfef7ea7d1550b
+Subproject commit 18203bf0af4639a51a08c705e7b07bc864d2116b
diff --git a/QuantExt/qle/termstructures/spreadedinflationcurve.cpp b/QuantExt/qle/termstructures/spreadedinflationcurve.cpp
index e9fc25e48c..08e3e12a66 100644
--- a/QuantExt/qle/termstructures/spreadedinflationcurve.cpp
+++ b/QuantExt/qle/termstructures/spreadedinflationcurve.cpp
@@ -36,6 +36,7 @@ SpreadedZeroInflationCurve::SpreadedZeroInflationCurve(const Handle<ZeroInflatio
     interpolation_ = QuantLib::ext::make_shared<FlatExtrapolation>(
         QuantLib::ext::make_shared<LinearInterpolation>(times_.begin(), times_.end(), data_.begin()));
     interpolation_->enableExtrapolation();
+    enableExtrapolation(referenceCurve_->allowsExtrapolation());
     registerWith(referenceCurve_);
 }
 
@@ -85,6 +86,7 @@ SpreadedYoYInflationCurve::SpreadedYoYInflationCurve(const Handle<YoYInflationTe
     interpolation_ = QuantLib::ext::make_shared<FlatExtrapolation>(
         QuantLib::ext::make_shared<LinearInterpolation>(times_.begin(), times_.end(), data_.begin()));
     interpolation_->enableExtrapolation();
+    enableExtrapolation(referenceCurve_->allowsExtrapolation());
     registerWith(referenceCurve_);
 }
 QL_DEPRECATED_ENABLE_WARNING