diff --git a/tools/gdb-sd_dump_hashmaps.py b/tools/gdb-sd_dump_hashmaps.py
index ea151601075..0701d139e27 100644
--- a/tools/gdb-sd_dump_hashmaps.py
+++ b/tools/gdb-sd_dump_hashmaps.py
@@ -16,7 +16,6 @@ class sd_dump_hashmaps(gdb.Command):
                 d = gdb.parse_and_eval("hashmap_debug_list")
                 all_entry_sizes = gdb.parse_and_eval("all_entry_sizes")
                 all_direct_buckets = gdb.parse_and_eval("all_direct_buckets")
-                hashmap_base_t = gdb.lookup_type("HashmapBase")
                 uchar_t = gdb.lookup_type("unsigned char")
                 ulong_t = gdb.lookup_type("unsigned long")
                 debug_offset = gdb.parse_and_eval("(unsigned long)&((HashmapBase*)0)->debug")