diff --git a/src/key.cpp b/src/key.cpp
index af9ffaf792f..75114c6afe1 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -370,6 +370,7 @@ bool CKey::SetCompactSignature(uint256 hash, const std::vector<unsigned char>& v
         ECDSA_SIG_free(sig);
         return true;
     }
+    ECDSA_SIG_free(sig);
     return false;
 }