diff --git a/src/include/ranges/srange.cc.h b/src/include/ranges/srange.cc.h
index 7c9dfde..8a6a33f 100644
--- a/src/include/ranges/srange.cc.h
+++ b/src/include/ranges/srange.cc.h
@@ -128,9 +128,14 @@ namespace CNORXZ
 
     template <typename MetaT, SizeT S>
     template <SizeT I>
-    UPos SIndex<MetaT,S>::stepSize(const IndexId<I>& id) const
+    decltype(auto) SIndex<MetaT,S>::stepSize(const IndexId<I>& id) const
     {
-	return UPos(id == this->id() ? 1 : 0);
+	if constexpr(I != 0){
+	    return SPos<0>();
+	}
+	else {
+	    return UPos(id == this->id() ? 1 : 0);
+	}
     }
 
     template <typename MetaT, SizeT S>
diff --git a/src/include/ranges/srange.h b/src/include/ranges/srange.h
index 5cf1661..dc7598f 100644
--- a/src/include/ranges/srange.h
+++ b/src/include/ranges/srange.h
@@ -88,7 +88,7 @@ namespace CNORXZ
 
 	/** @copydoc IndexInterface::stepSize() */
 	template <SizeT I>
-	UPos stepSize(const IndexId<I>& id) const;
+	decltype(auto) stepSize(const IndexId<I>& id) const;
 
 	/** @copydoc IndexInterface::stringMeta() */
 	String stringMeta() const;