diff --git a/src/log2xml/mark-errors.xsl b/src/log2xml/mark-errors.xsl
new file mode 100644
index 000000000..4e91913e5
--- /dev/null
+++ b/src/log2xml/mark-errors.xsl
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+
+  <xsl:template match="@*|node()">
+    <xsl:copy>
+      <xsl:apply-templates select="@*|node()"/>
+    </xsl:copy>
+  </xsl:template>
+
+  <xsl:template match="line">
+    <line>
+      <xsl:if test="contains(text(), ' *** ') or
+                    contains(text(), 'LaTeX Error') or
+                    contains(text(), 'FAIL:') or
+                    contains(text(), ' error: ') or
+                    true">
+         <xsl:attribute name="error"></xsl:attribute>
+      </xsl:if>
+      <xsl:apply-templates select="@*|node()"/>
+    </line>
+  </xsl:template>
+  
+</xsl:stylesheet>
\ No newline at end of file