diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 2ea5bd78f..6516c7176 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -104,7 +104,10 @@ static bool Sign1(const CKeyID& address, const BaseSignatureCreator& creator, co
 {
     vector<unsigned char> vchSig;
     if (!creator.CreateSig(vchSig, address, scriptCode, consensusBranchId))
+    {
+        fprintf(stderr,"Sign1 creatsig error\n");
         return false;
+    }
     ret.push_back(vchSig);
     return true;
 }