diff --git a/src/ipa/libipa/lsc_polynomial.cpp b/src/ipa/libipa/lsc_polynomial.cpp
index f607d86c54c3..00569c2fd160 100644
--- a/src/ipa/libipa/lsc_polynomial.cpp
+++ b/src/ipa/libipa/lsc_polynomial.cpp
@@ -77,5 +77,27 @@ namespace ipa {
  * \param size The size of the reference image
  */
 
-} // namespace ipa
-} // namespace libcamera
+} /* namespace ipa */
+
+#ifndef __DOXYGEN__
+template<>
+std::optional<ipa::LscPolynomial>
+ValueNode::Accessor<ipa::LscPolynomial>::get(const ValueNode &obj) const
+{
+	std::optional<double> cx = obj["cx"].get<double>();
+	std::optional<double> cy = obj["cy"].get<double>();
+	std::optional<double> k0 = obj["k0"].get<double>();
+	std::optional<double> k1 = obj["k1"].get<double>();
+	std::optional<double> k2 = obj["k2"].get<double>();
+	std::optional<double> k3 = obj["k3"].get<double>();
+	std::optional<double> k4 = obj["k4"].get<double>();
+
+	if (!(cx && cy && k0 && k1 && k2 && k3 && k4))
+		LOG(LscPolynomial, Error)
+			<< "Polynomial is missing a parameter";
+
+	return ipa::LscPolynomial(*cx, *cy, *k0, *k1, *k2, *k3, *k4);
+}
+#endif /* __DOXYGEN__ */
+
+} /* namespace libcamera */
diff --git a/src/ipa/libipa/lsc_polynomial.h b/src/ipa/libipa/lsc_polynomial.h
index d7d9ae42e360..d52ec86946b1 100644
--- a/src/ipa/libipa/lsc_polynomial.h
+++ b/src/ipa/libipa/lsc_polynomial.h
@@ -80,28 +80,4 @@ private:
 
 } /* namespace ipa */
 
-#ifndef __DOXYGEN__
-
-template<>
-struct ValueNode::Accessor<ipa::LscPolynomial> {
-	std::optional<ipa::LscPolynomial> get(const ValueNode &obj) const
-	{
-		std::optional<double> cx = obj["cx"].get<double>();
-		std::optional<double> cy = obj["cy"].get<double>();
-		std::optional<double> k0 = obj["k0"].get<double>();
-		std::optional<double> k1 = obj["k1"].get<double>();
-		std::optional<double> k2 = obj["k2"].get<double>();
-		std::optional<double> k3 = obj["k3"].get<double>();
-		std::optional<double> k4 = obj["k4"].get<double>();
-
-		if (!(cx && cy && k0 && k1 && k2 && k3 && k4))
-			LOG(LscPolynomial, Error)
-				<< "Polynomial is missing a parameter";
-
-		return ipa::LscPolynomial(*cx, *cy, *k0, *k1, *k2, *k3, *k4);
-	}
-};
-
-#endif
-
 } /* namespace libcamera */