diff --git a/usb4java-lib/src/test/c/dump.c b/usb4java-lib/src/test/c/dump.c
index 8a85097..6ca5c54 100644
--- a/usb4java-lib/src/test/c/dump.c
+++ b/usb4java-lib/src/test/c/dump.c
@@ -95,7 +95,7 @@ void dump_interface(struct usb_interface iface)
 
 void dump_config_descriptor(struct usb_config_descriptor config)
 {
-    int i, max;
+    int i;
 
     indent(); printf("Config Descriptor:\n");
     level++;