1 files changed, 4 insertions, 1 deletions
diff --git a/source/blender/editors/space_node/node_relationships.cc b/source/blender/editors/space_node/node_relationships.cc
index 441c63b9fc3..a5117fbd25b 100644
--- a/source/blender/editors/space_node/node_relationships.cc
+++ b/source/blender/editors/space_node/node_relationships.cc
@@ -212,7 +212,10 @@ static bool socket_is_available(bNodeTree *UNUSED(ntree), bNodeSocket *sock, con
   }
 
   if (!allow_used && (sock->flag & SOCK_IN_USE)) {
-    return false;
+    /* Multi input sockets are available (even if used). */
+    if (!(sock->flag & SOCK_MULTI_INPUT)) {
+      return false;
+    }
   }
 
   return true;