diff --git a/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/chart.xsl b/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/chart.xsl
index 2583433c8..79de198f4 100644
--- a/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/chart.xsl
+++ b/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/chart.xsl
@@ -154,6 +154,7 @@ exclude-result-prefixes="#all"
                     <xsl:with-param name="category" select="$category"/>
                     <xsl:with-param name="series" select="$series"/>
                     <xsl:with-param name="container" select="$container"/>
+                    <xsl:with-param name="canvas-id" select="$canvas-id"/>
                 </xsl:call-template>
             </ixsl:schedule-action>
         </xsl:variable>
diff --git a/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/imports/ldh.xsl b/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/imports/ldh.xsl
index 2d017bd6c..8ebf140cb 100644
--- a/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/imports/ldh.xsl
+++ b/src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/imports/ldh.xsl
@@ -32,7 +32,7 @@ exclude-result-prefixes="#all">
         <xsl:param name="service" as="xs:anyURI?"/>
         <xsl:param name="endpoint" as="xs:anyURI?"/>
         <xsl:param name="show-properties" select="false()" as="xs:boolean"/>
-        <xsl:param name="canvas-id" select="generate-id() || '-chart-canvas'" as="xs:string?" tunnel="yes"/>
+        <xsl:param name="canvas-id" select="generate-id() || '-chart-canvas'" as="xs:string" tunnel="yes"/>
 
         <xsl:apply-templates select="." mode="bs2:Header"/>