diff --git a/runtime/config-deployer-service/ballerina/APIClient.bal b/runtime/config-deployer-service/ballerina/APIClient.bal
index a11f5ca900..b5ea081e25 100644
--- a/runtime/config-deployer-service/ballerina/APIClient.bal
+++ b/runtime/config-deployer-service/ballerina/APIClient.bal
@@ -361,7 +361,7 @@ public class APIClient {
             } else if authentication.authType == "JWT" {
                 JWTAuthentication jwtAuthentication = check authentication.cloneWithType(JWTAuthentication);
                 authTypes.jwt = {header: <string>jwtAuthentication.headerName, sendTokenToUpstream: <boolean>jwtAuthentication.sendTokenToUpstream, disabled: !jwtAuthentication.enabled, audience: jwtAuthentication.audience};
-            } else if authentication.authType == "APIKey" && authentication is APIKeyAuthentication {
+            } else if authentication.authType == "APIKey" {
                 APIKeyAuthentication apiKeyAuthentication = check authentication.cloneWithType(APIKeyAuthentication);
                 model:APIKey[] apiKeys = [];
                 boolean|() headerEnabled = apiKeyAuthentication.headerEnable;
diff --git a/runtime/config-deployer-service/ballerina/tests/resources/apiKeyOnly.apk-conf b/runtime/config-deployer-service/ballerina/tests/resources/apiKeyOnly.apk-conf
index 52ef282892..b1f0824119 100644
--- a/runtime/config-deployer-service/ballerina/tests/resources/apiKeyOnly.apk-conf
+++ b/runtime/config-deployer-service/ballerina/tests/resources/apiKeyOnly.apk-conf
@@ -18,6 +18,7 @@ authentication:
   - authType: "APIKey"
     enabled: true
     queryParamEnable: true
+    headerEnable: true
 corsConfiguration:
   corsConfigurationEnabled: false
   accessControlAllowOrigins:
diff --git a/runtime/config-deployer-service/ballerina/tests/resources/jwtandAPIKey.apk-conf b/runtime/config-deployer-service/ballerina/tests/resources/jwtandAPIKey.apk-conf
index 62d5518b9a..88b21c4aa3 100644
--- a/runtime/config-deployer-service/ballerina/tests/resources/jwtandAPIKey.apk-conf
+++ b/runtime/config-deployer-service/ballerina/tests/resources/jwtandAPIKey.apk-conf
@@ -20,6 +20,7 @@ authentication:
   - authType: "APIKey"
     enabled: true
     queryParamEnable: true
+    headerEnable: true
 corsConfiguration:
   corsConfigurationEnabled: false
   accessControlAllowOrigins: