diff --git a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/emit/BIREmitter.java b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/emit/BIREmitter.java
index 6db3aa71fa00..cd4754b44073 100644
--- a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/emit/BIREmitter.java
+++ b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/emit/BIREmitter.java
@@ -25,6 +25,7 @@
 
 import java.io.PrintStream;
 import java.util.List;
+import java.util.Set;
 
 import static org.wso2.ballerinalang.compiler.bir.emit.EmitterUtils.emitBasicBlockRef;
 import static org.wso2.ballerinalang.compiler.bir.emit.EmitterUtils.emitFlags;
@@ -101,7 +102,7 @@ public static String emitModule(BIRNode.BIRPackage mod) {
         return modStr;
     }
 
-    private static String emitImports(List<BIRNode.BIRImportModule> impMods) {
+    private static String emitImports(Set<BIRNode.BIRImportModule> impMods) {
 
         StringBuilder impStr = new StringBuilder();
         for (BIRNode.BIRImportModule mod : impMods) {
diff --git a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/model/BIRNode.java b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/model/BIRNode.java
index d2862f16aa9a..ac1692fbaf31 100644
--- a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/model/BIRNode.java
+++ b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/model/BIRNode.java
@@ -30,6 +30,7 @@
 
 import java.util.ArrayList;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
@@ -55,7 +56,7 @@ protected BIRNode(Location pos) {
      */
     public static class BIRPackage extends BIRNode {
         public final PackageID packageID;
-        public final List<BIRImportModule> importModules;
+        public final Set<BIRImportModule> importModules;
         public final List<BIRTypeDefinition> typeDefs;
         public final List<BIRGlobalVariableDcl> globalVars;
         public final Set<BIRGlobalVariableDcl> importedGlobalVarsDummyVarDcls;
@@ -74,7 +75,7 @@ public BIRPackage(Location pos, Name org, Name pkgName, Name name, Name version,
                           String sourceRoot, boolean skipTest, boolean isTestPkg) {
             super(pos);
             packageID = new PackageID(org, pkgName, name, version, sourceFileName, sourceRoot, isTestPkg, skipTest);
-            this.importModules = new ArrayList<>();
+            this.importModules = new LinkedHashSet<>();
             this.typeDefs = new ArrayList<>();
             this.globalVars = new ArrayList<>();
             this.importedGlobalVarsDummyVarDcls = new HashSet<>();
@@ -107,6 +108,24 @@ public BIRImportModule(Location pos, Name org, Name name, Name version) {
         public void accept(BIRVisitor visitor) {
             visitor.visit(this);
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+
+            if (o == null || getClass() != o.getClass()) {
+                return false;
+            }
+
+            return this.packageID.equals(((BIRImportModule) o).packageID);
+        }
+
+        @Override
+        public int hashCode() {
+            return this.packageID.hashCode();
+        }
     }
 
     /**
diff --git a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/writer/BIRBinaryWriter.java b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/writer/BIRBinaryWriter.java
index b6e121461c9d..8df6c69efb68 100644
--- a/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/writer/BIRBinaryWriter.java
+++ b/compiler/ballerina-lang/src/main/java/org/wso2/ballerinalang/compiler/bir/writer/BIRBinaryWriter.java
@@ -38,6 +38,7 @@
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.util.List;
+import java.util.Set;
 
 import static org.wso2.ballerinalang.compiler.bir.writer.BIRWriterUtils.writeConstValue;
 
@@ -95,7 +96,7 @@ public byte[] serialize() {
 
     // private methods
 
-    private void writeImportModuleDecls(ByteBuf buf, List<BIRNode.BIRImportModule> birImpModList) {
+    private void writeImportModuleDecls(ByteBuf buf, Set<BIRNode.BIRImportModule> birImpModList) {
         buf.writeInt(birImpModList.size());
         birImpModList.forEach(impMod -> {
             PackageID packageID =  impMod.packageID;