diff --git a/sonar-scm-mercurial-plugin/src/main/java/org/sonar/plugins/scm/mercurial/MercurialBlameCommand.java b/sonar-scm-mercurial-plugin/src/main/java/org/sonar/plugins/scm/mercurial/MercurialBlameCommand.java
index e2d051d..47d39f9 100644
--- a/sonar-scm-mercurial-plugin/src/main/java/org/sonar/plugins/scm/mercurial/MercurialBlameCommand.java
+++ b/sonar-scm-mercurial-plugin/src/main/java/org/sonar/plugins/scm/mercurial/MercurialBlameCommand.java
@@ -99,7 +99,7 @@ private void blame(FileSystem fs, InputFile inputFile, BlameOutput output) {
       LOG.debug("The mercurial blame command [" + cl.toString() + "] failed: " + stderr.getOutput());
     }
     List<BlameLine> lines = consumer.getLines();
-    if (lines.size() == inputFile.lines() - 1) {
+    if (lines.size() > 0 && lines.size() == inputFile.lines() - 1) {
       // SONARPLUGINS-3097 Mercurial do not report blame on last empty line
       lines.add(lines.get(lines.size() - 1));
     }