diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
index a4a1640..128c306 100644
--- a/scripts/gdb/linux/utils.py
+++ b/scripts/gdb/linux/utils.py
@@ -83,7 +83,7 @@
         elif "big endian" in endian:
             target_endianness = BIG_ENDIAN
         else:
-            raise gdb.GdgError("unknown endianness '{0}'".format(endian))
+            raise gdb.GdgError("unknown endianness '{0}'".format(str(endian)))
     return target_endianness