diff --git a/jdplus-incubator-base/jdplus-stl-base-parent/jdplus-stl-base-core/src/main/java/jdplus/stl/base/core/RawStlKernel.java b/jdplus-incubator-base/jdplus-stl-base-parent/jdplus-stl-base-core/src/main/java/jdplus/stl/base/core/RawStlKernel.java
index 0d0a910..5bdc58f 100644
--- a/jdplus-incubator-base/jdplus-stl-base-parent/jdplus-stl-base-core/src/main/java/jdplus/stl/base/core/RawStlKernel.java
+++ b/jdplus-incubator-base/jdplus-stl-base-parent/jdplus-stl-base-core/src/main/java/jdplus/stl/base/core/RawStlKernel.java
@@ -90,7 +90,7 @@ private RawStlResults finishProcessing() {
                 .irregular(DoubleSeq.of(irr))
                 .fit(DoubleSeq.of(fit))
                 .seasonal(DoubleSeq.of(season))
-                .weights(weights == null ? DoubleSeq.empty() : DoubleSeq.of(weights))
+                .weights(weights == null ? DoubleSeq.onMapping(n, x -> 1.0) : DoubleSeq.of(weights))
                 .sa(DoubleSeq.of(sa))
                 .build();
     }