1 files changed, 2 insertions, 1 deletions

diff --git a/fs/fcntl.c b/fs/fcntl.c
index 3e7ab16ed154..286a9f8f3d49 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/security.h>
 #include <linux/ptrace.h>
+#include <linux/signal.h>
 
 #include <asm/poll.h>
 #include <asm/siginfo.h>
@@ -308,7 +309,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
                 break;
         case F_SETSIG:
                 /* arg == 0 restores default behaviour. */
-                if (arg < 0 || arg > _NSIG) {
+                if (!valid_signal(arg)) {
                         break;
                 }
                 err = 0;