fallback version, as JDT is not submitting new code to build
diff --git a/org.eclipse.jdt.debug/eval/org/eclipse/jdt/internal/debug/eval/ast/instructions/RuntimeSignature.java b/org.eclipse.jdt.debug/eval/org/eclipse/jdt/internal/debug/eval/ast/instructions/RuntimeSignature.java
index 89ea9d1..37b0f48 100644
--- a/org.eclipse.jdt.debug/eval/org/eclipse/jdt/internal/debug/eval/ast/instructions/RuntimeSignature.java
+++ b/org.eclipse.jdt.debug/eval/org/eclipse/jdt/internal/debug/eval/ast/instructions/RuntimeSignature.java
@@ -1,6 +1,6 @@
 package org.eclipse.jdt.internal.debug.eval.ast.instructions;
 
-import org.eclipse.jdt.core.compiler.CharOperation;
+import org.eclipse.jdt.internal.compiler.util.CharOperation;
 
 /**
  * Copy of org.eclipse.jdt.core.Signature. The class is copied here