diff --git a/libs/lpad-sm-dp-plus-connector/src/main/java/com/truphone/util/TextUtil.kt b/libs/lpad-sm-dp-plus-connector/src/main/java/com/truphone/util/TextUtil.kt
index 0086c85..5845ba0 100644
--- a/libs/lpad-sm-dp-plus-connector/src/main/java/com/truphone/util/TextUtil.kt
+++ b/libs/lpad-sm-dp-plus-connector/src/main/java/com/truphone/util/TextUtil.kt
@@ -51,7 +51,7 @@ object TextUtil {
      */
     @JvmStatic
     fun decodeHex(str: String): ByteArray {
-        if (str.length % 2 == 0) {
+        if (str.length % 2 != 0) {
             throw NumberFormatException("Must have an even length")
         }