diff --git a/source/blender/functions/FN_multi_function_network.hh b/source/blender/functions/FN_multi_function_network.hh
index 01860c540e3..195711a7c62 100644
--- a/source/blender/functions/FN_multi_function_network.hh
+++ b/source/blender/functions/FN_multi_function_network.hh
@@ -148,6 +148,7 @@ class MFSocket : NonCopyable, NonMovable {
   StringRefNull name() const;
 
   uint id() const;
+  uint index() const;
 
   const MFDataType &data_type() const;
 
@@ -398,6 +399,11 @@ inline uint MFSocket::id() const
   return id_;
 }
 
+inline uint MFSocket::index() const
+{
+  return index_;
+}
+
 inline const MFDataType &MFSocket::data_type() const
 {
   return data_type_;