fix: another signal h/t ethan
fix: another signal h/t ethan

pipermerriam/pyethereum,ddworken/pyethereum,karlfloersch/pyethereum,ethereum/pyethereum,inzem77/pyethereum,ebuchman/daoist_protocol,pipermerriam/pyethereum,harlantwood/pyethereum,karlfloersch/pyethereum,vaporry/pyethereum,holiman/pyethereum,shahankhatch/pyethereum,ckeenan/pyethereum,ethers/pyethereum,jnnk/pyethereum,ethereum/pyethereum,ethermarket/pyethereum,shahankhatch/pyethereum,ebuchman/daoist_protocol