diff --git a/util/compatfd.c b/util/compatfd.c
index c296f55d14..ee47dd8089 100644
--- a/util/compatfd.c
+++ b/util/compatfd.c
@@ -16,7 +16,9 @@
 #include "qemu/osdep.h"
 #include "qemu/thread.h"
 
+#if defined(CONFIG_SIGNALFD)
 #include <sys/syscall.h>
+#endif
 
 struct sigfd_compat_info
 {