diff --git a/src/main/java/org/opensky/libadsb/ModeSDecoder.java b/src/main/java/org/opensky/libadsb/ModeSDecoder.java
index 50ae8f1..22062f5 100644
--- a/src/main/java/org/opensky/libadsb/ModeSDecoder.java
+++ b/src/main/java/org/opensky/libadsb/ModeSDecoder.java
@@ -145,7 +145,7 @@ public ModeSReply decode(ModeSReply modes) throws BadFormatException, Unspecifie
 					if (ftc == 29) {
 						int subtype = (es1090.getMessage()[0]>>>1) & 0x3;
 						// DO-260B 2.2.3.2.7.1: ignore for ADS-B v0 transponders if ME bit 11 != 0
-						boolean hasMe11Bit = (es1090.getMessage()[1]&0x40) != 0;
+						boolean hasMe11Bit = (es1090.getMessage()[1]&0x20) != 0;
 
 						if (subtype == 1 && (dd.adsbVersion > 0 || !hasMe11Bit)) {
 							return new TargetStateAndStatusMsg(es1090);