diff --git a/external-config/src/main/groovy/grails/plugin/externalconfig/ExternalConfigRunListener.groovy b/external-config/src/main/groovy/grails/plugin/externalconfig/ExternalConfigRunListener.groovy
index 608c330..95d8187 100644
--- a/external-config/src/main/groovy/grails/plugin/externalconfig/ExternalConfigRunListener.groovy
+++ b/external-config/src/main/groovy/grails/plugin/externalconfig/ExternalConfigRunListener.groovy
@@ -177,7 +177,7 @@ class ExternalConfigRunListener implements SpringApplicationRunListener {
         sources.findAll { String location ->
                 try {
                     def resource = defaultResourceLoader.getResource(location)
-                    if (!resource.file.exists()) {
+                    if (!resource.exists()) {
                         log.debug("Configuration file ${location} not found, ignoring.")
                         return false
                     }