diff --git a/korman/nodes/node_python.py b/korman/nodes/node_python.py
index be25501..e924580 100644
--- a/korman/nodes/node_python.py
+++ b/korman/nodes/node_python.py
@@ -478,7 +478,7 @@ class PlasmaAttribStringNode(PlasmaAttribNodeBase, bpy.types.Node):
     def update(self):
         super().update()
         attrib = self.to_socket
-        if attrib is not None:
+        if attrib is not None and not self.value:
             self.value = attrib.simple_value