diff --git a/plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java b/plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java
index a0c2364f036..19c07e5a516 100644
--- a/plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java
+++ b/plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java
@@ -87,4 +87,13 @@ public interface IStack extends IDMService {
      * Retrieves variables local to the stack frame.
      */
     void getLocals(IDMContext<?> frameCtx, DataRequestMonitor<IVariableDMContext[]> rm);
+    
+    /**
+     * Retrieves the stack depth of the specified stack frame.
+     */
+    void getStackDepth(DataRequestMonitor<Integer> rm);
+    
+    void getStackDepth(int maxDepth, DataRequestMonitor<Integer> rm);
+
+        
 }