diff --git a/lib/libc/gen/siginterrupt.c b/lib/libc/gen/siginterrupt.c
index dde474c43e0c..fde33ca567ce 100644
--- a/lib/libc/gen/siginterrupt.c
+++ b/lib/libc/gen/siginterrupt.c
@@ -46,7 +46,7 @@ int
 siginterrupt(sig, flag)
 	int sig, flag;
 {
-	extern sigset_t _sigintr;
+	extern sigset_t _sigintr __hidden;
 	struct sigaction sa;
 	int ret;
 
diff --git a/lib/libc/gen/signal.c b/lib/libc/gen/signal.c
index c93633e23bbb..ee96dcc3c5b6 100644
--- a/lib/libc/gen/signal.c
+++ b/lib/libc/gen/signal.c
@@ -41,7 +41,7 @@ __FBSDID("$FreeBSD$");
 #include "un-namespace.h"
 #include "libc_private.h"
 
-sigset_t _sigintr;		/* shared with siginterrupt */
+sigset_t _sigintr __hidden;	/* shared with siginterrupt */
 
 sig_t
 signal(s, a)