diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java
index b4cc4ce..a972e5a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java
@@ -79,7 +79,7 @@
                             throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, typeTag0,
                                     ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);
                         }
-                        byte typeTag1 = argPtr0.getTag();
+                        byte typeTag1 = argPtr1.getTag();
                         if (typeTag1 != ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG) {
                             throw new TypeMismatchException(sourceLoc, getIdentifier(), 1, typeTag1,
                                     ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);