diff --git a/utils/autotune/autotune.c b/utils/autotune/autotune.c
index 99bbb79..11d1733 100644
--- a/utils/autotune/autotune.c
+++ b/utils/autotune/autotune.c
@@ -294,8 +294,11 @@ int main(int argc, char *const argv[])
 		}
 	}
 
-	if (background)
-		daemon(0, 0);
+	if (background) {
+		ret = daemon(0, 0);
+		if (ret)
+			error(1, errno, "daemon failed");
+	}
 
 	fd = open("/dev/rtdm/autotune", O_RDONLY);
 	if (fd < 0)
diff --git a/include/copperplate/debug.h b/include/copperplate/debug.h
index 027f12c..d2516ff 100644
--- a/include/copperplate/debug.h
+++ b/include/copperplate/debug.h
@@ -25,7 +25,7 @@
 
 struct threadobj;
 
-#define debug(__fmt, __args...)						\
+#define xeno_debug(__fmt, __args...)						\
 	do {								\
 		struct threadobj *__thobj = threadobj_current();	\
 		if (__thobj == NULL ||					\
@@ -35,7 +35,7 @@ struct threadobj;
 
 #else /* !CONFIG_XENO_DEBUG */
 
-#define debug(fmt, args...)  do { } while (0)
+#define xeno_debug(fmt, args...)  do { } while (0)
 
 #endif /* !CONFIG_XENO_DEBUG */