diff --git a/configure b/configure
index c2f114b9a0e..d1a52a116f4 100755
--- a/configure
+++ b/configure
@@ -8713,12 +8713,6 @@ if test "x$ac_cv_header_syscall_h" = xyes
 then :
   printf "%s\n" "#define HAVE_SYSCALL_H 1" >>confdefs.h
 
-fi
-ac_fn_c_check_header_compile "$LINENO" "termios.h" "ac_cv_header_termios_h" "$ac_includes_default"
-if test "x$ac_cv_header_termios_h" = xyes
-then :
-  printf "%s\n" "#define HAVE_TERMIOS_H 1" >>confdefs.h
-
 fi
 ac_fn_c_check_header_compile "$LINENO" "unistd.h" "ac_cv_header_unistd_h" "$ac_includes_default"
 if test "x$ac_cv_header_unistd_h" = xyes
diff --git a/configure.ac b/configure.ac
index d023f77a275..d032c60e5c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -511,7 +511,6 @@ AC_CHECK_HEADERS(\
 	sys/vnode.h \
 	sys/wait.h \
 	syscall.h \
-	termios.h \
 	unistd.h \
 	utime.h \
 	valgrind/memcheck.h \
diff --git a/dlls/ntdll/unix/serial.c b/dlls/ntdll/unix/serial.c
index 83244d02d41..ff2786ada70 100644
--- a/dlls/ntdll/unix/serial.c
+++ b/dlls/ntdll/unix/serial.c
@@ -31,9 +31,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <stdio.h>
-#ifdef HAVE_TERMIOS_H
 #include <termios.h>
-#endif
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>
diff --git a/include/config.h.in b/include/config.h.in
index 2affc4d6329..9ff8a89f888 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -751,9 +751,6 @@
 /* Define to 1 if you have the `tcdrain' function. */
 #undef HAVE_TCDRAIN
 
-/* Define to 1 if you have the <termios.h> header file. */
-#undef HAVE_TERMIOS_H
-
 /* Define to 1 if you have the `thr_kill2' function. */
 #undef HAVE_THR_KILL2
 
diff --git a/server/serial.c b/server/serial.c
index e84da228125..905bde4d69a 100644
--- a/server/serial.c
+++ b/server/serial.c
@@ -31,14 +31,12 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <time.h>
+#include <termios.h>
 #include <unistd.h>
 #include <poll.h>
 #ifdef HAVE_UTIME_H
 #include <utime.h>
 #endif
-#ifdef HAVE_TERMIOS_H
-#include <termios.h>
-#endif
 #ifdef HAVE_SYS_IOCTL_H
 #include <sys/ioctl.h>
 #endif