diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9d28d89..31dc96c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -47,6 +47,8 @@ else()
     message(STATUS "No sanitizer enabled")
 endif()
 
+add_compile_options(-march=native)
+
 add_library(swiftnet STATIC ${SOURCE_FILES})
 add_library(swiftnet_shared SHARED ${SOURCE_FILES})
 
diff --git a/src/internal/internal.h b/src/internal/internal.h
index 32af631..eab8919 100644
--- a/src/internal/internal.h
+++ b/src/internal/internal.h
@@ -14,6 +14,12 @@
 #include <net/if.h>
 #include "../swift_net.h"
 
+#ifdef __APPLE__
+    #include <sys/_endian.h>
+#elif __linux__
+    #include <endian.h>
+#endif
+
 #ifdef __linux__
 #define LOOPBACK_INTERFACE_NAME "lo\0"
 #elif defined(__APPLE__)
diff --git a/src/process_packets.c b/src/process_packets.c
index 314b3df..2b7ce8d 100644
--- a/src/process_packets.c
+++ b/src/process_packets.c
@@ -1,6 +1,5 @@
 #include "internal/internal.h"
 #include "swift_net.h"
-#include <_time.h>
 #include <arpa/inet.h>
 #include <netinet/in.h>
 #include <netinet/ip.h>
diff --git a/src/send_packet.c b/src/send_packet.c
index 48b6edd..898cef7 100644
--- a/src/send_packet.c
+++ b/src/send_packet.c
@@ -8,7 +8,6 @@
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/_endian.h>
 #include <sys/socket.h>
 #include <time.h>
 #include <unistd.h>