diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 9575d2c5c..da16fce61 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1961,7 +1961,7 @@ void SimulateIso14443aTagEx(uint8_t tagType, uint16_t flags, uint8_t *useruid, u
 
                     bool risky = false;
                     for (int i = 0; i < 4; i++) {
-                        risky |= (orig[i] & ~receivedCmd[2 + i]);
+                        risky |= (orig[i] & ~receivedCmd[2 + i]) != 0;
                     }
 
                     if (risky) {