diff --git a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/CStackFrame.java b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/CStackFrame.java
index 8a49c55b6b9..826d7cba843 100644
--- a/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/CStackFrame.java
+++ b/debug/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/internal/core/CStackFrame.java
@@ -572,6 +572,8 @@ public class CStackFrame extends CDebugElement
 	
 	protected void disposeAllVariables()
 	{
+		if ( fVariables == null )
+			return;
 		Iterator it = fVariables.iterator();
 		while( it.hasNext() )
 		{