diff --git a/src/nodes/tsl/TSLCore.js b/src/nodes/tsl/TSLCore.js
index 612362d8eaca00..5757e930f4ae1e 100644
--- a/src/nodes/tsl/TSLCore.js
+++ b/src/nodes/tsl/TSLCore.js
@@ -305,7 +305,7 @@ class ShaderCallNodeInternal extends Node {
 		} else {
 
 			const jsFunc = shaderNode.jsFunc;
-			const outputNode = inputNodes !== null ? jsFunc( inputNodes, builder ) : jsFunc( builder );
+			const outputNode = inputNodes !== null || jsFunc.length > 1 ? jsFunc( inputNodes || [], builder ) : jsFunc( builder );
 
 			result = nodeObject( outputNode );