diff --git a/Kernel/TTY/TTY.cpp b/Kernel/TTY/TTY.cpp
index f7facde2b3..b4544e09bb 100644
--- a/Kernel/TTY/TTY.cpp
+++ b/Kernel/TTY/TTY.cpp
@@ -414,6 +414,8 @@ int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
     case TIOCSCTTY:
         current_process.set_tty(this);
         return 0;
+    case TIOCSTI:
+        return -EIO;
     case TIOCNOTTY:
         current_process.set_tty(nullptr);
         return 0;
diff --git a/Userland/Libraries/LibC/sys/ioctl_numbers.h b/Userland/Libraries/LibC/sys/ioctl_numbers.h
index 345f2d43de..9502b1c26b 100644
--- a/Userland/Libraries/LibC/sys/ioctl_numbers.h
+++ b/Userland/Libraries/LibC/sys/ioctl_numbers.h
@@ -55,6 +55,7 @@ enum IOCtlNumber {
     TCFLSH,
     TIOCGWINSZ,
     TIOCSCTTY,
+    TIOCSTI,
     TIOCNOTTY,
     TIOCSWINSZ,
     FB_IOCTL_GET_SIZE_IN_BYTES,
@@ -81,6 +82,7 @@ enum IOCtlNumber {
 #define TCFLSH TCFLSH
 #define TIOCGWINSZ TIOCGWINSZ
 #define TIOCSCTTY TIOCSCTTY
+#define TIOCSTI TIOCSTI
 #define TIOCNOTTY TIOCNOTTY
 #define TIOCSWINSZ TIOCSWINSZ
 #define FB_IOCTL_GET_SIZE_IN_BYTES FB_IOCTL_GET_SIZE_IN_BYTES