@@ -, +, @@ 
---
 configure.ac                         | 2 +-
 hw/xfree86/os-support/shared/sigio.c | 4 ++--
 include/meson.build                  | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)
--- a/configure.ac	
+++ a/configure.ac	
@@ -160,7 +160,7 @@ AC_CHECK_FUNCS([backtrace geteuid getuid issetugid getresuid \
 	getdtablesize getifaddrs getpeereid getpeerucred getprogname getzoneid \
 	mmap posix_fallocate seteuid shmctl64 strncasecmp vasprintf vsnprintf \
 	walkcontext setitimer poll epoll_create1 mkostemp memfd_create \
-	sigprocmask])
+	sigprocmask isastream])
 AC_CONFIG_LIBOBJ_DIR([os])
 AC_REPLACE_FUNCS([reallocarray strcasecmp strcasestr strlcat strlcpy strndup\
 	timingsafe_memcmp])
--- a/hw/xfree86/os-support/shared/sigio.c	
+++ a/hw/xfree86/os-support/shared/sigio.c	
@@ -208,7 +208,7 @@ xf86InstallSIGIOHandler(int fd, void (*f) (int, void *), void *closure)
                 }
             }
 #endif
-#ifdef I_SETSIG                 /* System V Streams - used on Solaris for input devices */
+#ifdef HAVE_ISASTREAM           /* System V Streams - used on Solaris for input devices */
             if (!installed && isastream(fd)) {
                 if (ioctl(fd, I_SETSIG, S_INPUT | S_ERROR | S_HANGUP) == -1) {
                     xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG): %s\n",
@@ -279,7 +279,7 @@ xf86RemoveSIGIOHandler(int fd)
 #ifdef O_ASYNC
         fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC);
 #endif
-#ifdef I_SETSIG
+#ifdef HAVE_ISASTREAM
         if (isastream(fd)) {
             if (ioctl(fd, I_SETSIG, 0) == -1) {
                 xf86Msg(X_WARNING, "fcntl(%d, I_SETSIG, 0): %s\n",
--- a/include/meson.build	
+++ a/include/meson.build	
@@ -136,6 +136,7 @@ conf_data.set('HAVE_CBRT', cc.has_function('cbrt'))
 conf_data.set('HAVE_EPOLL_CREATE1', cc.has_function('epoll_create1'))
 conf_data.set('HAVE_GETUID', cc.has_function('getuid'))
 conf_data.set('HAVE_GETEUID', cc.has_function('geteuid'))
+conf_data.set('HAVE_ISASTREAM', cc.has_function('isastream'))
 conf_data.set('HAVE_ISSETUGID', cc.has_function('issetugid'))
 conf_data.set('HAVE_GETIFADDRS', cc.has_function('getifaddrs'))
 conf_data.set('HAVE_GETPEEREID', cc.has_function('getpeereid'))
--