diff --git a/counterparty-core/counterpartycore/lib/gettxinfo.py b/counterparty-core/counterpartycore/lib/gettxinfo.py
index ff7aded3d..81eedcb9b 100644
--- a/counterparty-core/counterpartycore/lib/gettxinfo.py
+++ b/counterparty-core/counterpartycore/lib/gettxinfo.py
@@ -192,6 +192,8 @@ def collect_sighash_flags(script_sig, witnesses):
             flag = get_der_signature_sighash_flag(item)
             if flag is not None:
                 flags.append(flag)
+
+    if len(witnesses) == 0:
         return flags
 
     witnesses = [