diff --git a/nmap-os-db b/nmap-os-db
index 26c09b63a..67f8979b2 100644
--- a/nmap-os-db
+++ b/nmap-os-db
@@ -3811,6 +3811,8 @@ Class Apple | iOS | 5.X | media device
 CPE cpe:/o:apple:iphone_os:5
 Class Apple | Mac OS X | 10.8.X | general purpose
 CPE cpe:/o:apple:mac_os_x:10.8
+Class Apple | Mac OS X | 10.9.X | general purpose
+CPE cpe:/o:apple:mac_os_x:10.9
 SEQ(SP=F1-109%GCD=1-6%ISR=FF-111%TI=RD%II=RI%TS=8|A|C)
 OPS(O1=M5B4NW4NNT11SLL%O2=M5B4NW4NNT11SLL%O3=M5B4NW4NNT11%O4=M5B4NW4NNT11SLL%O5=M5B4NW4NNT11SLL%O6=M5B4NNT11SLL)
 WIN(W1=FFFF%W2=FFFF%W3=FFFF%W4=FFFF%W5=FFFF%W6=FFFF)