diff --git a/share/keys/pkgbase-15/trusted/Makefile b/share/keys/pkgbase-15/trusted/Makefile
index e6205999b12f..32db72ae368a 100644
--- a/share/keys/pkgbase-15/trusted/Makefile
+++ b/share/keys/pkgbase-15/trusted/Makefile
@@ -1,8 +1,9 @@
 PACKAGE=	pkg-bootstrap
 
-FILES=	awskms-15
+FILES=	awskms-15 \
+	backup-signing-15
 
 FILESDIR=	${SHAREDIR}/keys/pkgbase-15/trusted
 FILESMODE=	644
 
 .include <bsd.prog.mk>
diff --git a/share/keys/pkgbase-15/trusted/backup-signing-15 b/share/keys/pkgbase-15/trusted/backup-signing-15
new file mode 100644
index 000000000000..a147d6788cf2
--- /dev/null
+++ b/share/keys/pkgbase-15/trusted/backup-signing-15
@@ -0,0 +1,2 @@
+function: "sha256"
+fingerprint: "56a77bdcb6c3cf7984729c6138bd5617c24aa0d466b3b604c96205b2c5629f3c"