diff --git a/src/main/kotlin/no/item/xp/plugin/GenerateCodePlugin.kt b/src/main/kotlin/no/item/xp/plugin/GenerateCodePlugin.kt
index c063abf..94457fc 100644
--- a/src/main/kotlin/no/item/xp/plugin/GenerateCodePlugin.kt
+++ b/src/main/kotlin/no/item/xp/plugin/GenerateCodePlugin.kt
@@ -1,6 +1,7 @@
 package no.item.xp.plugin
 
 import no.item.xp.plugin.phrases.GenerateI18nPhrasesTask
+import no.item.xp.plugin.util.IGNORED_XML_FILE_NAMES
 import no.item.xp.plugin.util.getTargetFile
 import org.gradle.api.Plugin
 import org.gradle.api.Project
@@ -14,7 +15,7 @@ abstract class GenerateCodePlugin : Plugin<Project> {
       javaExt.sourceSets
         .getAt("main")
         .resources
-        .filter { it.extension == "xml" && it.name != "application.xml" && it.name != "styles.xml" }
+        .filter { it.extension == "xml" && it.name !in IGNORED_XML_FILE_NAMES }
         .files
 
     val targetDir = File(project.rootDir.absolutePath + File.separator + ".xp-codegen")
diff --git a/src/main/kotlin/no/item/xp/plugin/util/JarUtils.kt b/src/main/kotlin/no/item/xp/plugin/util/JarUtils.kt
index 7d58d85..256c1a6 100644
--- a/src/main/kotlin/no/item/xp/plugin/util/JarUtils.kt
+++ b/src/main/kotlin/no/item/xp/plugin/util/JarUtils.kt
@@ -9,7 +9,7 @@ fun getXmlFilesInJars(config: Configuration): List<XmlFileInJar> {
     val zipFile = JarFile(jarFile)
 
     zipFile.entries().asSequence()
-      .filter { jarEntry -> jarEntry.name.startsWith("site") && jarEntry.name.endsWith(".xml") }
+      .filter { jarEntry -> !jarEntry.isDirectory && isDescriptorInJar(jarEntry.name) }
       .map { XmlFileInJar(zipFile, it) }
   }
 }
diff --git a/src/main/kotlin/no/item/xp/plugin/util/XmlFileFilters.kt b/src/main/kotlin/no/item/xp/plugin/util/XmlFileFilters.kt
new file mode 100644
index 0000000..bf3169a
--- /dev/null
+++ b/src/main/kotlin/no/item/xp/plugin/util/XmlFileFilters.kt
@@ -0,0 +1,19 @@
+package no.item.xp.plugin.util
+
+// Xml-files in an Enonic XP application that are not descriptors with forms
+val IGNORED_XML_FILE_NAMES = setOf("application.xml", "styles.xml")
+
+// Directories in an Enonic XP application that contains descriptors
+val XP_DESCRIPTOR_DIRECTORIES = listOf("site", "admin", "services", "tasks", "idprovider")
+
+/**
+ * Returns true if [entryName] (a path in a jar-file, using "/" as separator) is a descriptor that code should be
+ * generated for
+ */
+fun isDescriptorInJar(entryName: String): Boolean {
+  val fileName = entryName.substringAfterLast('/')
+
+  return entryName.endsWith(".xml") &&
+    fileName !in IGNORED_XML_FILE_NAMES &&
+    XP_DESCRIPTOR_DIRECTORIES.any { entryName.startsWith("$it/") }
+}
diff --git a/src/test/kotlin/no/item/xp/plugin/util/IsDescriptorInJarTest.kt b/src/test/kotlin/no/item/xp/plugin/util/IsDescriptorInJarTest.kt
new file mode 100644
index 0000000..aded3ed
--- /dev/null
+++ b/src/test/kotlin/no/item/xp/plugin/util/IsDescriptorInJarTest.kt
@@ -0,0 +1,32 @@
+package no.item.xp.plugin.util
+
+import org.junit.jupiter.api.Test
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class IsDescriptorInJarTest {
+  @Test
+  fun `accept descriptors in XP directories`() {
+    listOf(
+      "site/content-types/article/article.xml",
+      "site/site.xml",
+      "admin/tools/my-tool/my-tool.xml",
+      "admin/widgets/my-widget/my-widget.xml",
+      "services/search/search.xml",
+      "tasks/cleanup/cleanup.xml",
+      "idprovider/idprovider.xml",
+    ).forEach { assertTrue(isDescriptorInJar(it), it) }
+  }
+
+  @Test
+  fun `reject other files`() {
+    listOf(
+      "site/styles.xml",
+      "application.xml",
+      "META-INF/maven/no.item/app/pom.xml",
+      "lib/my-lib/config.xml",
+      "sites/content-types/article/article.xml",
+      "site/content-types/article/article.html",
+    ).forEach { assertFalse(isDescriptorInJar(it), it) }
+  }
+}