diff --git a/src/hasher.cpp b/src/hasher.cpp
index 24bfdf7c7..a80dc9ae4 100644
--- a/src/hasher.cpp
+++ b/src/hasher.cpp
@@ -114,7 +114,7 @@ namespace libtorrent {
 		sha1_hash digest;
 #ifdef TORRENT_USE_LIBGCRYPT
 		gcry_md_final(m_context);
-		digest.assign((char const*)gcry_md_read(m_context, 0));
+		digest.assign(reinterpret_cast<char const*>(gcry_md_read(m_context, 0)));
 #elif TORRENT_USE_COMMONCRYPTO
 		CC_SHA1_Final(reinterpret_cast<unsigned char*>(digest.data()), &m_context);
 #elif TORRENT_USE_CRYPTOAPI
diff --git a/src/hasher512.cpp b/src/hasher512.cpp
index 9f4b96614..76b91454d 100644
--- a/src/hasher512.cpp
+++ b/src/hasher512.cpp
@@ -102,7 +102,7 @@ namespace libtorrent {
 		sha512_hash digest;
 #ifdef TORRENT_USE_LIBGCRYPT
 		gcry_md_final(m_context);
-		digest.assign((char const*)gcry_md_read(m_context, 0));
+		digest.assign(reinterpret_cast<char const*>(gcry_md_read(m_context, 0)));
 #elif TORRENT_USE_COMMONCRYPTO
 		CC_SHA512_Final(reinterpret_cast<unsigned char*>(digest.data()), &m_context);
 #elif TORRENT_USE_CRYPTOAPI_SHA_512