diff --git a/scm/src/main/org/apache/maven/plugins/scm/ScmDiffBean.java b/scm/src/main/org/apache/maven/plugins/scm/ScmDiffBean.java
index cd8fe8de..c108335d 100644
--- a/scm/src/main/org/apache/maven/plugins/scm/ScmDiffBean.java
+++ b/scm/src/main/org/apache/maven/plugins/scm/ScmDiffBean.java
@@ -34,6 +34,8 @@ import java.io.File;
 public class ScmDiffBean extends ScmPatternBean
 {
     private String patchFile;
+    private String startRevision;
+    private String endRevision;
 
     public void diff()
         throws Exception
@@ -43,7 +45,7 @@ public class ScmDiffBean extends ScmPatternBean
         ScmRepository repository = getScmRepository( scmManager );
 
         ScmFileSet fileSet = new ScmFileSet( new File( getWorkingDirectory() ), getIncludes(), getExcludes() );
-        DiffScmResult result = scmManager.diff( repository, fileSet, null, null );
+        DiffScmResult result = scmManager.diff( repository, fileSet, startRevision, endRevision );
         checkResult( result );
 
         FileUtils.fileWrite( patchFile, result.getPatch() );
@@ -59,5 +61,23 @@ public class ScmDiffBean extends ScmPatternBean
         return patchFile;
     }
 
-}
+	public String getStartRevision()
+	{
+		return startRevision;
+	}
 
+	public void setStartRevision(String startRevision)
+	{
+		this.startRevision = startRevision;
+	}
+
+	public String getEndRevision()
+	{
+		return endRevision;
+	}
+
+	public void setEndRevision(String endRevision)
+	{
+		this.endRevision = endRevision;
+	}
+}