diff --git a/src/networkProviders/apiNetworkProvider.ts b/src/networkProviders/apiNetworkProvider.ts
index b0e092c3..bf9cf685 100644
--- a/src/networkProviders/apiNetworkProvider.ts
+++ b/src/networkProviders/apiNetworkProvider.ts
@@ -18,7 +18,7 @@ import { DefinitionOfFungibleTokenOnNetwork, DefinitionOfTokenCollectionOnNetwor
 import { FungibleTokenOfAccountOnNetwork, NonFungibleTokenOfAccountOnNetwork } from "./tokens";
 import { TransactionOnNetwork, prepareTransactionForBroadcasting } from "./transactions";
 import { TransactionStatus } from "./transactionStatus";
-import { extendUserAgent, isBackend } from "./userAgent";
+import { extendUserAgentIfBackend } from "./userAgent";
 
 // TODO: Find & remove duplicate code between "ProxyNetworkProvider" and "ApiNetworkProvider".
 export class ApiNetworkProvider implements INetworkProvider {
@@ -34,9 +34,7 @@ export class ApiNetworkProvider implements INetworkProvider {
         this.config = { ...defaultAxiosConfig, ...config };
         this.backingProxyNetworkProvider = new ProxyNetworkProvider(url, proxyConfig);
         this.axios = getAxios();
-        if (isBackend()) {
-            extendUserAgent(this.userAgentPrefix, this.config);
-        }
+        extendUserAgentIfBackend(this.userAgentPrefix, this.config);
     }
 
     private getProxyConfig(config: NetworkProviderConfig | undefined) {
diff --git a/src/networkProviders/proxyNetworkProvider.ts b/src/networkProviders/proxyNetworkProvider.ts
index 505ca908..5b205975 100644
--- a/src/networkProviders/proxyNetworkProvider.ts
+++ b/src/networkProviders/proxyNetworkProvider.ts
@@ -15,7 +15,7 @@ import { DefinitionOfFungibleTokenOnNetwork, DefinitionOfTokenCollectionOnNetwor
 import { FungibleTokenOfAccountOnNetwork, NonFungibleTokenOfAccountOnNetwork } from "./tokens";
 import { TransactionOnNetwork, prepareTransactionForBroadcasting } from "./transactions";
 import { TransactionStatus } from "./transactionStatus";
-import { extendUserAgent, isBackend } from "./userAgent";
+import { extendUserAgentIfBackend } from "./userAgent";
 
 // TODO: Find & remove duplicate code between "ProxyNetworkProvider" and "ApiNetworkProvider".
 export class ProxyNetworkProvider implements INetworkProvider {
@@ -28,9 +28,7 @@ export class ProxyNetworkProvider implements INetworkProvider {
         this.url = url;
         this.config = { ...defaultAxiosConfig, ...config };
         this.axios = getAxios();
-        if (isBackend()) {
-            extendUserAgent(this.userAgentPrefix, this.config);
-        }
+        extendUserAgentIfBackend(this.userAgentPrefix, this.config);
     }
 
     async getNetworkConfig(): Promise<NetworkConfig> {
diff --git a/src/networkProviders/userAgent.ts b/src/networkProviders/userAgent.ts
index 41b6a55b..bea3d1cb 100644
--- a/src/networkProviders/userAgent.ts
+++ b/src/networkProviders/userAgent.ts
@@ -2,7 +2,13 @@ import { AxiosHeaders } from "axios";
 import { UnknownClientName } from "./constants";
 import { NetworkProviderConfig } from "./networkProviderConfig";
 
-export function extendUserAgent(userAgentPrefix: string, config: NetworkProviderConfig) {
+export function extendUserAgentIfBackend(userAgentPrefix: string, config: NetworkProviderConfig) {
+    if (isBackend()) {
+        extendUserAgent(userAgentPrefix, config);
+    }
+}
+
+function extendUserAgent(userAgentPrefix: string, config: NetworkProviderConfig) {
     if (!config.headers) {
         config.headers = new AxiosHeaders({});
     }
@@ -22,6 +28,6 @@ export function extendUserAgent(userAgentPrefix: string, config: NetworkProvider
     headers.setUserAgent(newUserAgent, true);
 }
 
-export function isBackend(): boolean {
+function isBackend(): boolean {
     return typeof window === "undefined";
 }