diff --git a/lib/libwebsockets.h b/lib/libwebsockets.h
index 785e2ccff..460c73260 100644
--- a/lib/libwebsockets.h
+++ b/lib/libwebsockets.h
@@ -4013,9 +4013,6 @@ lws_set_timeout(struct lws *wsi, enum pending_timeout reason, int secs);
 #if !defined(LWS_SIZEOFPTR)
 #define LWS_SIZEOFPTR (sizeof (void *))
 #endif
-#if !defined(u_int64_t)
-#define u_int64_t unsigned long long
-#endif
 
 #if defined(__x86_64__)
 #define _LWS_PAD_SIZE 16	/* Intel recommended for best performance */
diff --git a/lib/misc/sha-1.c b/lib/misc/sha-1.c
index 9353fbefe..50205a010 100644
--- a/lib/misc/sha-1.c
+++ b/lib/misc/sha-1.c
@@ -45,7 +45,7 @@ struct sha1_ctxt {
 	} h;
 	union {
 		unsigned char		b8[8];
-		u_int64_t		b64[1];
+		uint64_t		b64[1];
 	} c;
 	union {
 		unsigned char		b8[64];
diff --git a/lib/private-libwebsockets.h b/lib/private-libwebsockets.h
index 4d6babbfa..535fa0be5 100644
--- a/lib/private-libwebsockets.h
+++ b/lib/private-libwebsockets.h
@@ -356,9 +356,6 @@ esp8266_tcp_stream_bind(lws_sockfd_type fd, int port, struct lws *wsi);
 #ifndef BYTE_ORDER
 #define BYTE_ORDER LITTLE_ENDIAN
 #endif
-#ifndef u_int64_t
-typedef unsigned __int64 u_int64_t;
-#endif
 
 #undef __P
 #ifndef __P