diff --git a/api/src/main/java/org/openmrs/AllergyReaction.java b/api/src/main/java/org/openmrs/AllergyReaction.java
index 28d5e416e95..e087d87ccd1 100644
--- a/api/src/main/java/org/openmrs/AllergyReaction.java
+++ b/api/src/main/java/org/openmrs/AllergyReaction.java
@@ -10,24 +10,49 @@
 package org.openmrs;
 
 import org.apache.commons.lang3.StringUtils;
+import org.hibernate.annotations.GenericGenerator;
+import org.hibernate.annotations.Parameter;
 import org.hibernate.envers.Audited;
 import org.openmrs.util.OpenmrsUtil;
 
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+
 /**
  * Represent allergy reactions
  */
+@Entity
+@Table(name = "allergy_reaction")
 @Audited
 public class AllergyReaction extends BaseOpenmrsObject implements java.io.Serializable{
 	
 	public static final long serialVersionUID = 1;
 
-
+	@Id
+	@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "allergy_reaction_id_seq")
+	@GenericGenerator(
+		name = "allergy_reaction_id_seq",
+		strategy = "native",
+		parameters = @Parameter(name = "sequence", value = "allergy_reaction_allergy_reaction_id_seq")
+	)
+	@Column(name = "allergy_reaction_id")
 	private Integer allergyReactionId;
-	
+
+	@ManyToOne
+	@JoinColumn(name = "allergy_id", nullable = false)
 	private Allergy allergy;
-	
+
+	@ManyToOne
+	@JoinColumn(name = "reaction_concept_id", nullable = false)
 	private Concept reaction;
-	
+
+	@Column(name = "reaction_non_coded")
 	private String reactionNonCoded;
 	
 	/**
diff --git a/api/src/main/resources/hibernate.cfg.xml b/api/src/main/resources/hibernate.cfg.xml
index 2bd3c6ad8dc..fc645d164ea 100644
--- a/api/src/main/resources/hibernate.cfg.xml
+++ b/api/src/main/resources/hibernate.cfg.xml
@@ -21,8 +21,7 @@
 		<property name="hibernate.search.model_mapping">org.openmrs.api.db.hibernate.search.LuceneAnalyzerFactory</property>
 		
 		<!-- API -->
-
-		<mapping resource="org/openmrs/api/db/hibernate/AllergyReaction.hbm.xml" />
+		
 		<mapping resource="org/openmrs/api/db/hibernate/Concept.hbm.xml" />
 		<mapping resource="org/openmrs/api/db/hibernate/ConceptAnswer.hbm.xml" />
 		<mapping resource="org/openmrs/api/db/hibernate/ConceptAttribute.hbm.xml" />
diff --git a/api/src/main/resources/org/openmrs/api/db/hibernate/AllergyReaction.hbm.xml b/api/src/main/resources/org/openmrs/api/db/hibernate/AllergyReaction.hbm.xml
deleted file mode 100644
index 087d9d96607..00000000000
--- a/api/src/main/resources/org/openmrs/api/db/hibernate/AllergyReaction.hbm.xml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0"?>
-<!--
-
-    This Source Code Form is subject to the terms of the Mozilla Public License,
-    v. 2.0. If a copy of the MPL was not distributed with this file, You can
-    obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
-    the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
-
-    Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
-    graphic logo is a trademark of OpenMRS Inc.
-
--->
-<!DOCTYPE hibernate-mapping PUBLIC
-        "-//Hibernate/Hibernate Mapping DTD 3.1//EN"
-        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
-
-<hibernate-mapping package="org.openmrs" auto-import="false">
-    <class name="AllergyReaction" table="allergy_reaction">
-        <id name="allergyReactionId" type="int" column="allergy_reaction_id">
-            <generator class="native">
-                <param name="sequence">allergy_reaction_allergy_reaction_id_seq</param>
-            </generator>
-        </id>
-        <discriminator column="allergy_reaction_id" insert="false"/>
-        <many-to-one name="allergy" class="Allergy" column="allergy_id" not-null="true"/>
-        <many-to-one name="reaction" column="reaction_concept_id" class="org.openmrs.Concept" not-null="true"/>
-        <property name="reactionNonCoded" type="java.lang.String" column="reaction_non_coded"/>
-        <property name="uuid" type="java.lang.String" column="uuid" length="38" unique="true" not-null="true"/>
-    </class>
-</hibernate-mapping>
diff --git a/api/src/test/java/org/openmrs/api/OrderServiceTest.java b/api/src/test/java/org/openmrs/api/OrderServiceTest.java
index 6d553c03825..325ee8e3720 100644
--- a/api/src/test/java/org/openmrs/api/OrderServiceTest.java
+++ b/api/src/test/java/org/openmrs/api/OrderServiceTest.java
@@ -20,6 +20,7 @@
 import org.junit.jupiter.api.Test;
 
 import org.openmrs.Allergy;
+import org.openmrs.AllergyReaction;
 import org.openmrs.CareSetting;
 import org.openmrs.Concept;
 import org.openmrs.ConceptClass;
@@ -2740,6 +2741,7 @@ public void saveOrder_shouldFailIfTheJavaTypeOfThePreviousOrderDoesNotMatch() th
 			.addAnnotatedClass(ProgramAttributeType.class)
 			.addAnnotatedClass(HL7InError.class)
 			.addAnnotatedClass(OrderType.class)
+			.addAnnotatedClass(AllergyReaction.class)
 			.getMetadataBuilder().build();