--- a/src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxAppImageBuilder.java	Wed Oct 23 10:10:34 2019 -0400
+++ b/src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxAppImageBuilder.java	Wed Oct 23 10:37:54 2019 -0400
@@ -169,7 +169,8 @@
             throws IOException {
 
         Path iconTarget = appLayout.destktopIntegrationDirectory().resolve(
-                APP_NAME.fetchFrom(params) + ".png");
+                APP_NAME.fetchFrom(params) + IOUtils.getSuffix(Path.of(
+                DEFAULT_ICON)));
 
         createResource(DEFAULT_ICON, params)
                 .setCategory("icon")