diff --git a/tools/sky/serialdump.c b/tools/sky/serialdump.c
index 12fd0abfc..deab56df4 100644
--- a/tools/sky/serialdump.c
+++ b/tools/sky/serialdump.c
@@ -208,6 +208,8 @@ main(int argc, char **argv)
   options.c_cflag |= CS8;
 
   /* Raw input */
+  options.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
+                       | INLCR | IGNCR | ICRNL | IXON);
   options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
   /* Raw output */
   options.c_oflag &= ~OPOST;