diff --git a/test_libs/pyspec/eth2spec/fuzzing/decoder.py b/test_libs/pyspec/eth2spec/fuzzing/decoder.py
index bb8aceb61..5722ed297 100644
--- a/test_libs/pyspec/eth2spec/fuzzing/decoder.py
+++ b/test_libs/pyspec/eth2spec/fuzzing/decoder.py
@@ -69,7 +69,7 @@ def translate_value(value, typ):
         elem_typ = spec_ssz.read_elem_type(typ)
         return [translate_value(elem, elem_typ) for elem in value]
     elif spec_ssz.is_bool_type(typ):
-        return False
+        return value
     elif spec_ssz.is_vector_type(typ):
         elem_typ = spec_ssz.read_elem_type(typ)
         return typ(translate_value(elem, elem_typ) for elem in value)