diff --git a/nmap-os-db b/nmap-os-db
index 29321f503..52d7a44d9 100644
--- a/nmap-os-db
+++ b/nmap-os-db
@@ -343,7 +343,7 @@ IE(DFI=N%T=FA-104%TG=FF%TOSI=Z%CD=S%SI=S%DLI=S)
 # 3Com SuperStack 3 Switch 4400 SE
 Fingerprint 3Com SuperStack 3 Switch 4400 SE
 Class 3Com | embedded || switch
-SEQ(SP=0-5%ISR=0-5%TI=I%II=I%SS=S%TS=U)
+SEQ(SP=0-5%ISR=0-5%GCD=0%TI=I%II=I%SS=S%TS=U)
 OPS(O1=M594%O2=M594%O3=M594%O4=M594%O5=M594%O6=M594)
 WIN(W1=400%W2=400%W3=400%W4=400%W5=400%W6=400)
 ECN(R=Y%DF=N%T=FA-104%TG=FF%W=400%O=M594%CC=N%Q=)