diff --git a/libraries/libfc/include/fc/crypto/base64.hpp b/libraries/libfc/include/fc/crypto/base64.hpp
index d57e2d11e5..67d48af782 100644
--- a/libraries/libfc/include/fc/crypto/base64.hpp
+++ b/libraries/libfc/include/fc/crypto/base64.hpp
@@ -5,11 +5,11 @@
 namespace fc {
 std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_len);
 inline std::string base64_encode(char const* bytes_to_encode, unsigned int in_len) { return base64_encode( (unsigned char const*)bytes_to_encode, in_len); }
-std::string base64_encode( const std::string_view& enc );
-std::string base64_decode( const std::string_view& encoded_string);
+std::string base64_encode( std::string_view enc );
+std::string base64_decode( std::string_view encoded_string);
 
 std::string base64url_encode(unsigned char const* bytes_to_encode, unsigned int in_len);
 inline std::string base64url_encode(char const* bytes_to_encode, unsigned int in_len) { return base64url_encode( (unsigned char const*)bytes_to_encode, in_len); }
-std::string base64url_encode( const std::string_view& enc );
-std::string base64url_decode( const std::string_view& encoded_string);
+std::string base64url_encode( std::string_view enc );
+std::string base64url_decode( std::string_view encoded_string);
 }  // namespace fc
diff --git a/libraries/libfc/include/fc/crypto/private_key.hpp b/libraries/libfc/include/fc/crypto/private_key.hpp
index cc80757a8c..8c296677ba 100644
--- a/libraries/libfc/include/fc/crypto/private_key.hpp
+++ b/libraries/libfc/include/fc/crypto/private_key.hpp
@@ -53,7 +53,7 @@ namespace fc { namespace crypto {
          storage_type _storage;
 
          private_key( storage_type&& other_storage )
-            :_storage(other_storage)
+            :_storage(std::move(other_storage))
          {}
 
          friend bool operator == ( const private_key& p1, const private_key& p2);
diff --git a/libraries/libfc/src/crypto/base64.cpp b/libraries/libfc/src/crypto/base64.cpp
index d5369dcbad..d7308ac87b 100644
--- a/libraries/libfc/src/crypto/base64.cpp
+++ b/libraries/libfc/src/crypto/base64.cpp
@@ -215,7 +215,7 @@ std::string base64_encode(unsigned char const* bytes_to_encode, size_t in_len, b
 }
 
 template <typename String>
-static std::string decode(String const& encoded_string, bool remove_linebreaks) {
+static std::string decode(const String& encoded_string, bool remove_linebreaks) {
  //
  // decode(…) is templated so that it can be used with String = const std::string&
  // or std::string_view (requires at least C++17)
@@ -343,20 +343,20 @@ std::string base64_decode(std::string_view s, bool remove_linebreaks) {
 std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_len) {
    return base64_encode(bytes_to_encode, in_len, false);
 }
-std::string base64_encode(const std::string_view& enc) {
+std::string base64_encode(std::string_view enc) {
    return base64_encode(enc, false);
 }
-std::string base64_decode(const std::string_view& encoded_string) {
+std::string base64_decode(std::string_view encoded_string) {
    return base64_decode(encoded_string, false);
 }
 
 std::string base64url_encode(unsigned char const* bytes_to_encode, unsigned int in_len) {
    return base64_encode(bytes_to_encode, in_len, true);
 }
-std::string base64url_encode(const std::string_view& enc) {
+std::string base64url_encode(std::string_view enc) {
    return base64_encode(enc, true);
 }
-std::string base64url_decode(const std::string_view& encoded_string) {
+std::string base64url_decode(std::string_view encoded_string) {
    return base64_decode(encoded_string, true);
 }