diff --git a/xslt/DiveLog.xslt b/xslt/DiveLog.xslt
index 9855ae34e..818b50d49 100644
--- a/xslt/DiveLog.xslt
+++ b/xslt/DiveLog.xslt
@@ -2,17 +2,31 @@
   <xsl:strip-space elements="*"/>
   <xsl:output method="xml" indent="yes"/>
 
+  <xsl:key name="DC" match="dive" use="concat(@ComputerID, ':', @Computer)"/>
+
   <xsl:template match="/">
     <divelog program='subsurface-import' version='2'>
       <settings>
-          <divecomputerid deviceid="ffffffff">
+        <!-- Using the serial number as device ID for now. Once we have
+             a change to get some testing done, we can jump on using
+             extension that provides sha1 function.
+
++  xmlns:crypto="http://exslt.org/crypto"
++  extension-element-prefixes="crypto"
++        <divecomputerid deviceid="{substring(crypto:sha1(concat(@ComputerID, ':', @Computer)), 1, 8)}">
+
+-->
+
+        <xsl:for-each select="logbook/dive[generate-id() = generate-id(key('DC',concat(@ComputerID, ':', @Computer))[1])]">
+          <divecomputerid deviceid="{@ComputerID}">
             <xsl:attribute name="model">
-              <xsl:value-of select="logbook/@program"/>
+              <xsl:value-of select="@Computer"/>
             </xsl:attribute>
             <xsl:attribute name="serial">
-              <xsl:value-of select="logbook/@serialNumber"/>
+              <xsl:value-of select="@ComputerID"/>
             </xsl:attribute>
           </divecomputerid>
+        </xsl:for-each>
       </settings>
       <dives>
         <xsl:apply-templates select="/logbook"/>
@@ -136,7 +150,8 @@
         <xsl:value-of select="@DiveMaster"/>
       </divemaster>
 
-      <divecomputer deviceid="ffffffff">
+      <divecomputer deviceid="{@ComputerID}">
+
         <xsl:attribute name="model">
           <xsl:value-of select="@Computer"/>
         </xsl:attribute>