diff --git a/src/libcamera/software_isp/debayer.h b/src/libcamera/software_isp/debayer.h
index 352ffb89ad9d5a32ed1bbb14253af5e3f21d508c..e149c94e1c66666996adf254060308b2688ca2a1 100644
--- a/src/libcamera/software_isp/debayer.h
+++ b/src/libcamera/software_isp/debayer.h
@@ -89,7 +89,7 @@ private:
 protected:
 	void setParams(DebayerParams &params);
 	void dmaSyncBegin(std::vector<DmaSyncer> &dmaSyncers, FrameBuffer *input, FrameBuffer *output);
-	bool isStandardBayerOrder(BayerFormat::Order order);
+	static bool isStandardBayerOrder(BayerFormat::Order order);
 };
 
 } /* namespace libcamera */