diff --git a/MFRC522.cpp b/MFRC522.cpp
index 1d91670..e5b871c 100644
--- a/MFRC522.cpp
+++ b/MFRC522.cpp
@@ -698,7 +698,7 @@ MFRC522::StatusCode MFRC522::PICC_Select(	Uid *uid,			///< Pointer to Uid struct
 				if (valueOfCollReg & 0x20) { // CollPosNotValid
 					return STATUS_COLLISION; // Without a valid collision position we cannot continue
 				}
-				byte collisionPos = result & 0x1F; // Values 0-31, 0 means bit 32.
+				byte collisionPos = valueOfCollReg & 0x1F; // Values 0-31, 0 means bit 32.
 				if (collisionPos == 0) {
 					collisionPos = 32;
 				}