diff --git a/interface/src/main/java/xsbti/compile/CachedCompiler.java b/interface/src/main/java/xsbti/compile/CachedCompiler.java
index 97a1a33b5..0722a68b9 100644
--- a/interface/src/main/java/xsbti/compile/CachedCompiler.java
+++ b/interface/src/main/java/xsbti/compile/CachedCompiler.java
@@ -7,5 +7,7 @@ import java.io.File;
 
 public interface CachedCompiler
 {
+	/** Returns an array of arguments representing the nearest command line equivalent of a call to run but without the command name itself.*/
+	public String[] commandArguments(File[] sources);
 	public void run(File[] sources, DependencyChanges cpChanges, AnalysisCallback callback, Logger log, Reporter delegate, CompileProgress progress);
 }