diff --git a/src/printer.c b/src/printer.c
index 54464dd..e1eec6c 100644
--- a/src/printer.c
+++ b/src/printer.c
@@ -100,15 +100,17 @@ int tabby_printer_packet_send(int fd,
         goto error_io;
     }
 
-    if (write(fd, body, header->size) < 0) {
-        goto error_io;
+    if (header->size) {
+        if (write(fd, body, header->size) < 0) {
+            goto error_io;
+        }
     }
 
     if (write(fd, &sum, sizeof(sum)) < 0) {
         goto error_io;
     }
 
-    if (read(fd, response, sizeof(response)) < 0) {
+    if (read(fd, response, sizeof(*response)) < 0) {
         goto error_io;
     }