diff --git a/lib/posix/termios.nim b/lib/posix/termios.nim
index f8de740d76..1fbccba9c8 100644
--- a/lib/posix/termios.nim
+++ b/lib/posix/termios.nim
@@ -263,7 +263,7 @@ proc tcGetSid*(fd: cint): Pid {.importc: "tcgetsid", header: "<termios.h>".}
 # Window size ioctl.  Should work on on any Unix that xterm has been ported to.
 var TIOCGWINSZ*{.importc, header: "<sys/ioctl.h>".}: culong
 
-type IOctl_WinSize* {.importc: "struct winsize", header: "<termios.h>",
+type IOctl_WinSize* {.importc: "struct winsize", header: "<sys/ioctl.h>",
                       final, pure.} = object
   ws_row*, ws_col*, ws_xpixel*, ws_ypixel*: cushort