diff --git a/packages/appsync-modelgen-plugin/src/__tests__/visitors/__snapshots__/appsync-java-visitor.test.ts.snap b/packages/appsync-modelgen-plugin/src/__tests__/visitors/__snapshots__/appsync-java-visitor.test.ts.snap
index b973bf217..7a37765e7 100644
--- a/packages/appsync-modelgen-plugin/src/__tests__/visitors/__snapshots__/appsync-java-visitor.test.ts.snap
+++ b/packages/appsync-modelgen-plugin/src/__tests__/visitors/__snapshots__/appsync-java-visitor.test.ts.snap
@@ -468,7 +468,7 @@ public final class Project implements Model {
   public static final QueryField PROJECT_TEAM_NAME = field(\\"Project\\", \\"projectTeamName\\");
   private final @ModelField(targetType=\\"ID\\", isRequired = true) String projectId;
   private final @ModelField(targetType=\\"String\\", isRequired = true) String name;
-  private final @ModelField(targetType=\\"Team\\") @HasOne(associatedWith = \\"project\\", type = Team.class) Team team = null;
+  private final @ModelField(targetType=\\"Team\\") @HasOne(associatedWith = \\"project\\", targetNames = {\\"projectTeamTeamId\\", \\"projectTeamName\\"}, type = Team.class) Team team = null;
   private @ModelField(targetType=\\"AWSDateTime\\", isReadOnly = true) Temporal.DateTime createdAt;
   private @ModelField(targetType=\\"AWSDateTime\\", isReadOnly = true) Temporal.DateTime updatedAt;
   private final @ModelField(targetType=\\"ID\\") String projectTeamTeamId;
diff --git a/packages/appsync-modelgen-plugin/src/visitors/appsync-java-visitor.ts b/packages/appsync-modelgen-plugin/src/visitors/appsync-java-visitor.ts
index ccf7b20e6..b9eba486d 100644
--- a/packages/appsync-modelgen-plugin/src/visitors/appsync-java-visitor.ts
+++ b/packages/appsync-modelgen-plugin/src/visitors/appsync-java-visitor.ts
@@ -1111,6 +1111,10 @@ export class AppSyncModelJavaVisitor<
       case CodeGenConnectionType.HAS_ONE:
         connectionDirectiveName = 'HasOne';
         connectionArguments.push(`associatedWith = "${this.getFieldName(connectionInfo.associatedWith)}"`);
+        if (this.isCustomPKEnabled()) {
+          const hasOneTargetNamesArgs = `targetNames = {${connectionInfo.targetNames.map(target => `"${target}"`).join(', ')}}`;
+          connectionArguments.push(hasOneTargetNamesArgs);
+        }
         break;
       case CodeGenConnectionType.HAS_MANY:
         connectionDirectiveName = 'HasMany';