diff --git a/lib/OpenLayers/Format/SLD/v1.js b/lib/OpenLayers/Format/SLD/v1.js
index 30440a8f50..8c2152d1fb 100644
--- a/lib/OpenLayers/Format/SLD/v1.js
+++ b/lib/OpenLayers/Format/SLD/v1.js
@@ -226,11 +226,13 @@ OpenLayers.Format.SLD.v1 = OpenLayers.Class(OpenLayers.Format.Filter.v1_0_0, {
                 this.readChildNodes(node, symbolizer.colorMap);
             },
             "ColorMapEntry": function(node, colorMap) {
+                var q = node.getAttribute("quantity");
+                var o = node.getAttribute("opacity");
                 colorMap.push({
                     color: node.getAttribute("color"),
-                    quantity: node.getAttribute("quantity") || undefined,
+                    quantity: q !== null ? parseFloat(q) : undefined,
                     label: node.getAttribute("label") || undefined,
-                    opacity: node.getAttribute("opacity") || undefined
+                    opacity: o !== null ? parseFloat(o) : undefined
                 });
             },
             "LineSymbolizer": function(node, rule) {
@@ -838,11 +840,11 @@ OpenLayers.Format.SLD.v1 = OpenLayers.Class(OpenLayers.Format.Filter.v1_0_0, {
                 var node = this.createElementNSPlus("sld:ColorMapEntry");
                 var a = colorMapEntry;
                 node.setAttribute("color", a.color);
-                a.opacity && node.setAttribute("opacity",
+                a.opacity !== undefined && node.setAttribute("opacity",
                     parseFloat(a.opacity));
-                a.quantity && node.setAttribute("quantity",
+                a.quantity !== undefined && node.setAttribute("quantity",
                     parseFloat(a.quantity));
-                a.label && node.setAttribute("label", a.label);
+                a.label !== undefined && node.setAttribute("label", a.label);
                 return node;
             },
             "PolygonSymbolizer": function(symbolizer) {
diff --git a/tests/Format/SLD/v1_0_0.html b/tests/Format/SLD/v1_0_0.html
index a0bd6fb05b..cfee1720f9 100644
--- a/tests/Format/SLD/v1_0_0.html
+++ b/tests/Format/SLD/v1_0_0.html
@@ -410,7 +410,7 @@
     }
     
     function test_RasterSymbolizer(t) {
-        t.plan(1);
+        t.plan(4);
         
         var format = new OpenLayers.Format.SLD.v1_0_0();
 
@@ -431,6 +431,10 @@
         var symbolizer = {};
         format.readNode(expected, {symbolizer: symbolizer});
         
+        t.eq(symbolizer.Raster.colorMap[0].quantity, 0, "quantity set correctly");
+        t.eq(symbolizer.Raster.colorMap[0].opacity, 0.5, "opacity set correctly");
+        t.eq(symbolizer.Raster.colorMap[1].opacity, undefined, "non-existent opacity results in undefined");
+        
         var got = format.writeNode("sld:RasterSymbolizer", symbolizer["Raster"]);
         
         t.xml_eq(got, expected, "Successfully round tripped RasterSymbolizer");