diff --git a/core/src/main/java/io/xpipe/core/process/ShellOpenFunction.java b/core/src/main/java/io/xpipe/core/process/ShellOpenFunction.java
index 8f323640d..ee620918c 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellOpenFunction.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellOpenFunction.java
@@ -4,6 +4,20 @@ import lombok.NonNull;
 
 public interface ShellOpenFunction {
 
+    static ShellOpenFunction unsupported() {
+        return new ShellOpenFunction() {
+            @Override
+            public CommandBuilder prepareWithoutInitCommand() {
+                throw new UnsupportedOperationException();
+            }
+
+            @Override
+            public CommandBuilder prepareWithInitCommand(@NonNull String command) {
+                throw new UnsupportedOperationException();
+            }
+        };
+    }
+
     static ShellOpenFunction of(String b) {
         return new ShellOpenFunction() {
             @Override