diff --git a/include/linux/signal.h b/include/linux/signal.h
index f428e86f48007..b5d99482d3fe1 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -388,7 +388,7 @@ extern bool unhandled_signal(struct task_struct *tsk, int sig);
 #endif
 
 #define siginmask(sig, mask) \
-	((sig) < SIGRTMIN && (rt_sigmask(sig) & (mask)))
+	((sig) > 0 && (sig) < SIGRTMIN && (rt_sigmask(sig) & (mask)))
 
 #define SIG_KERNEL_ONLY_MASK (\
 	rt_sigmask(SIGKILL)   |  rt_sigmask(SIGSTOP))