diff --git a/lib/OpenLayers/Format/WMTSCapabilities.js b/lib/OpenLayers/Format/WMTSCapabilities.js
index 3ad1f72ba8..157042cb55 100644
--- a/lib/OpenLayers/Format/WMTSCapabilities.js
+++ b/lib/OpenLayers/Format/WMTSCapabilities.js
@@ -153,7 +153,7 @@ OpenLayers.Format.WMTSCapabilities = OpenLayers.Class(OpenLayers.Format.XML.Vers
         }
 
         var projection = config.projection || matrixSet.supportedCRS.replace(
-                /urn:ogc:def:crs:(\w+):.+:(\w+)$/, "$1:$2");
+                /urn:ogc:def:crs:(\w+):(.*:)?(\w+)$/, "$1:$3");
         var units = config.units ||
                 projection === "EPSG:4326" ? "degrees" : "m"
 
diff --git a/tests/Format/WMTSCapabilities/v1_0_0.html b/tests/Format/WMTSCapabilities/v1_0_0.html
index 99dbcda238..81686b1fff 100644
--- a/tests/Format/WMTSCapabilities/v1_0_0.html
+++ b/tests/Format/WMTSCapabilities/v1_0_0.html
@@ -495,7 +495,7 @@ http://schemas.opengis.net/wmts/1.0/examples/wmtsGetCapabilities_response.xml
         </Layer>
         <TileMatrixSet>
             <ows:Identifier>21781</ows:Identifier>
-            <ows:SupportedCRS>urn:ogc:def:crs:EPSG:21781</ows:SupportedCRS>
+            <ows:SupportedCRS>urn:ogc:def:crs:EPSG::21781</ows:SupportedCRS>
             <TileMatrix>
                 <ows:Identifier>0</ows:Identifier>
                 <ScaleDenominator>14285750.5715</ScaleDenominator>