diff --git a/src/cpp/ripple/Wallet.cpp b/src/cpp/ripple/Wallet.cpp
index 1d21fb5eb6..8843e693c3 100644
--- a/src/cpp/ripple/Wallet.cpp
+++ b/src/cpp/ripple/Wallet.cpp
@@ -78,7 +78,7 @@ bool Wallet::nodeIdentityCreate() {
 #ifdef CREATE_NEW_DH_PARAMS
 	std::string		strDh512		= DH_der_gen(512);
 #else
-	static char dh512Param[] = {
+	static const unsigned char dh512Param[] = {
 		0x30, 0x46, 0x02, 0x41, 0x00, 0x98, 0x15, 0xd2, 0xd0, 0x08, 0x32, 0xda,
 		0xaa, 0xac, 0xc4, 0x71, 0xa3, 0x1b, 0x11, 0xf0, 0x6c, 0x62, 0xb2, 0x35,
 		0x8a, 0x10, 0x92, 0xc6, 0x0a, 0xa3, 0x84, 0x7e, 0xaf, 0x17, 0x29, 0x0b,
@@ -86,7 +86,7 @@ bool Wallet::nodeIdentityCreate() {
 		0x6e, 0xdb, 0x57, 0x72, 0x4a, 0x7e, 0xcd, 0xaf, 0xbd, 0x3a, 0x97, 0x55,
 		0x51, 0x77, 0x5a, 0x34, 0x7c, 0xe8, 0xc5, 0x71, 0x63, 0x02, 0x01, 0x02
 	};
-	std::string		strDh512(dh512Param, sizeof(dh512Param));
+	std::string		strDh512(reinterpret_cast<const char *>(dh512Param), sizeof(dh512Param));
 #endif