diff --git a/vlib/os/password_nix.c.v b/vlib/os/password_nix.c.v
index dc9bbfaf6e..acd46cf7f7 100644
--- a/vlib/os/password_nix.c.v
+++ b/vlib/os/password_nix.c.v
@@ -13,7 +13,7 @@ mut:
 
 fn C.tcgetattr(fd int, ptr &C.termios) int
 
-fn C.tcsetattr(fd int, action int, const_ptr &C.termios)
+fn C.tcsetattr(fd int, action int, const_ptr &C.termios) int
 
 // input_password prompts the user for a password-like secret. It disables
 // the terminal echo during user input and resets it back to normal when done.
diff --git a/vlib/term/term_nix.c.v b/vlib/term/term_nix.c.v
index e04eb30cf8..60738625f2 100644
--- a/vlib/term/term_nix.c.v
+++ b/vlib/term/term_nix.c.v
@@ -15,7 +15,7 @@ pub:
 
 fn C.tcgetattr(fd int, ptr &C.termios) int
 
-fn C.tcsetattr(fd int, action int, const_ptr &C.termios)
+fn C.tcsetattr(fd int, action int, const_ptr &C.termios) int
 
 fn C.ioctl(fd int, request u64, arg voidptr) int