diff --git a/xslt/shearwater.xslt b/xslt/shearwater.xslt
index ae6501a11..308303791 100644
--- a/xslt/shearwater.xslt
+++ b/xslt/shearwater.xslt
@@ -103,6 +103,16 @@
               </xsl:otherwise>
             </xsl:choose>
           </xsl:attribute>
+          <xsl:attribute name="po2">
+            <xsl:choose>
+              <xsl:when test="$units = 'imperial'">
+                <xsl:value-of select="concat(averagePPO2 div 14.5037738, ' bar')"/>
+              </xsl:when>
+              <xsl:otherwise>
+                <xsl:value-of select="concat(averagePPO2, ' bar')"/>
+              </xsl:otherwise>
+            </xsl:choose>
+          </xsl:attribute>
         </sample>
       </xsl:for-each>
     </dive>