diff --git a/ed25519.h b/ed25519.h
index da6c222..ccc6a37 100644
--- a/ed25519.h
+++ b/ed25519.h
@@ -44,7 +44,7 @@ public:
     const std::shared_ptr<std::array<uint8_t, 64>> data()      const noexcept;
     std::string base64String()                                 const noexcept;
 
-    bool operator==(const Ed25519::Signature& another)           const noexcept;
+    bool operator==(const Ed25519::Signature& another)         const noexcept;
     bool operator==(const std::array<uint8_t, 64>& rawAnother) const noexcept;
     bool operator==(const std::string& base64String)           const noexcept;