diff --git a/sys/kern/kern_procctl.c b/sys/kern/kern_procctl.c
--- a/sys/kern/kern_procctl.c
+++ b/sys/kern/kern_procctl.c
@@ -27,6 +27,8 @@
  * SUCH DAMAGE.
  */
 
+#include "opt_ktrace.h"
+
 #include <sys/param.h>
 #include <sys/_unrhdr.h>
 #include <sys/systm.h>
@@ -542,6 +544,8 @@
 
 	rk = data;
 	sx_assert(&proctree_lock, SX_LOCKED);
+	if (CAP_TRACING(td))
+		ktrcapfail(CAPFAIL_SIGNAL, &rk->rk_sig);
 	if (IN_CAPABILITY_MODE(td))
 		return (ECAPMODE);
 	if (rk->rk_sig <= 0 || rk->rk_sig > _SIG_MAXSIG ||
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -1906,8 +1906,12 @@
 	 * The main rationale behind this is that abort(3) is implemented as
 	 * kill(getpid(), SIGABRT).
 	 */
-	if (IN_CAPABILITY_MODE(td) && pid != td->td_proc->p_pid)
-		return (ECAPMODE);
+	if (pid != td->td_proc->p_pid) {
+		if (CAP_TRACING(td))
+			ktrcapfail(CAPFAIL_SIGNAL, &signum);
+		if (IN_CAPABILITY_MODE(td))
+			return (ECAPMODE);
+	}
 
 	AUDIT_ARG_SIGNUM(signum);
 	AUDIT_ARG_PID(pid);