diff --git a/debexpo/templates/source_viewer/contentviewer.mako b/debexpo/templates/source_viewer/contentviewer.mako
index eff7ca9dc189d6f6c674d71b5650274d5be4e160..e5771f51a3e12b3944169e11464094a910915766 100644
--- a/debexpo/templates/source_viewer/contentviewer.mako
+++ b/debexpo/templates/source_viewer/contentviewer.mako
@@ -131,7 +131,7 @@
     <tr>
     <td class="lines">
         % for j,i in enumerate(c.viewerContent):
-            <pre id="L${j}L"><a href="#L${j}S">${j}</a></pre>
+            <pre id="L${j+1}L"><a href="#L${j+1}S">${j+1}</a></pre>
         % endfor
 
     </td>
@@ -139,7 +139,7 @@
         <td>
         <div class='lines'>
             %for j,i in enumerate(c.contentMode):
-                <pre id='L${j}S'>${i}<br/></pre>
+                <pre id='L${j+1}S'>${i}<br/></pre>
             %endfor
         </div>
         </td>
@@ -149,13 +149,13 @@
     <div id="codeBrowser">
         % for j,i in enumerate(c.viewerContent):
         %if i=='':
-                <pre class="code" id="L${j}S"><br/></pre>
+                <pre class="code" id="L${j+1}S"><br/></pre>
         %else:
             %if c.type=="files":
-                    <pre class="code" id="L${j}S"><a
+                    <pre class="code" id="L${j+1}S"><a
                             href="${h.url(controller='source_browser',action='index',packageName=c.packageName,revision=c.revision,fileName=i)}">${i}</a></pre>
             %else:
-                    <pre class="code" id="L${j}S">${i|n}</pre>
+                    <pre class="code" id="L${j+1}S">${i|n}</pre>
             %endif
         %endif
         % endfor