diff --git a/include/libssh2.h b/include/libssh2.h
index 86fb41c..6a9893b 100644
--- a/include/libssh2.h
+++ b/include/libssh2.h
@@ -58,6 +58,14 @@
 #endif
 #endif
 
+#if _MSC_VER < 1300
+typedef unsigned __int64 libssh2_uint64_t;
+typedef __int64 libssh2_int64_t;
+#else
+typedef unsigned long long libssh2_uint64_t;
+typedef long long libssh2_int64_t;
+#endif
+
 #define LIBSSH2_VERSION								"0.4"
 #define LIBSSH2_APINO								200412301450
 
diff --git a/include/libssh2_priv.h b/include/libssh2_priv.h
index 6ed2587..e7be143 100644
--- a/include/libssh2_priv.h
+++ b/include/libssh2_priv.h
@@ -379,9 +379,9 @@ struct _LIBSSH2_MAC_METHOD {
 void libssh2_session_shutdown(LIBSSH2_SESSION *session);
 
 unsigned long libssh2_ntohu32(const unsigned char *buf);
-unsigned long long libssh2_ntohu64(const unsigned char *buf);
+libssh2_uint64_t libssh2_ntohu64(const unsigned char *buf);
 void libssh2_htonu32(unsigned char *buf, unsigned long val);
-void libssh2_htonu64(unsigned char *buf, unsigned long long val);
+void libssh2_htonu64(unsigned char *buf, libssh2_uint64_t val);
 
 int libssh2_packet_read(LIBSSH2_SESSION *session, int block);
 int libssh2_packet_ask_ex(LIBSSH2_SESSION *session, unsigned char packet_type, unsigned char **data, unsigned long *data_len, unsigned long match_ofs, const unsigned char *match_buf, unsigned long match_len, int poll_socket);
diff --git a/include/libssh2_sftp.h b/include/libssh2_sftp.h
index e99a717..278331e 100644
--- a/include/libssh2_sftp.h
+++ b/include/libssh2_sftp.h
@@ -82,7 +82,7 @@ struct _LIBSSH2_SFTP_ATTRIBUTES {
 	 */
 	unsigned long flags;
 
-	unsigned long long filesize;
+	libssh2_uint64_t filesize;
 	unsigned long uid, gid;
 	unsigned long permissions;
 	unsigned long atime, mtime;
diff --git a/src/sftp.c b/src/sftp.c
index f25327e..4c099c6 100644
--- a/src/sftp.c
+++ b/src/sftp.c
@@ -100,7 +100,7 @@ struct _LIBSSH2_SFTP_HANDLE {
 
 	union _libssh2_sftp_handle_data {
 		struct _libssh2_sftp_handle_file_data {
-			unsigned long long offset;
+			libssh2_uint64_t offset;
 		} file;
 		struct _libssh2_sftp_handle_dir_data {
 			unsigned long names_left;