diff --git a/src/ol/format/WMSCapabilities.js b/src/ol/format/WMSCapabilities.js
index c997feda2d..4a72564fa4 100644
--- a/src/ol/format/WMSCapabilities.js
+++ b/src/ol/format/WMSCapabilities.js
@@ -409,7 +409,7 @@ function readException(node, objectStack) {
 function readCapabilityLayer(node, objectStack) {
   const layerObject = pushParseAndPop({}, LAYER_PARSERS, node, objectStack);
 
-  if (layerObject.Layer === undefined) {
+  if (layerObject['Layer'] === undefined) {
     return Object.assign(layerObject, readLayer(node, objectStack));
   }