diff --git a/client.c b/client.c
index a0afcd9..f25a249 100644
--- a/client.c
+++ b/client.c
@@ -9,8 +9,11 @@
 #include <arpa/inet.h>
 #include <sys/stat.h>
 #include <pthread.h>
+
 #if !__APPLE__
-    #include <sys/sendfile.h>
+    #include <sys/sendfile.h> 
+#else
+    struct sf_hdtr hdtr; 
 #endif
 
 int sockfd;
@@ -18,7 +21,6 @@ char buf[BUFSIZ];
 char bufr[BUFSIZ];
 struct sockaddr_in their_addr;
 pthread_t thread;
-struct sf_hdtr hdtr;
 uint32_t file_size;
 int recv_bin = 0;
 
diff --git a/server.c b/server.c
index 914a030..82f91f0 100644
--- a/server.c
+++ b/server.c
@@ -13,8 +13,11 @@
 #include <unistd.h>
 #include <pthread.h>
 #include <time.h>
+
 #if !__APPLE__
-    #include <sys/sendfile.h>    
+    #include <sys/sendfile.h> 
+#else
+    struct sf_hdtr hdtr; 
 #endif
 
 #define PASSWORD "fumiama"
@@ -24,7 +27,6 @@
 int fd;
 socklen_t struct_len = sizeof(struct sockaddr_in);
 struct sockaddr_in server_addr;
-struct sf_hdtr hdtr;
 
 char *data_path;
 char *kanban_path;