diff --git a/templates/default/http-client.eta b/templates/default/http-client.eta
index d8dc2aab..62b313d6 100644
--- a/templates/default/http-client.eta
+++ b/templates/default/http-client.eta
@@ -171,7 +171,7 @@ export class HttpClient<SecurityDataType = unknown> {
         {
             ...requestParams,
             headers: {
-            ...(type ? { "Content-Type": type } : {}),
+            ...(type && type !== ContentType.FormData ? { "Content-Type": type } : {}),
             ...(requestParams.headers || {}),
             },
             signal: cancelToken ? this.createAbortSignal(cancelToken) : void 0,
diff --git a/templates/modular/http-client.eta b/templates/modular/http-client.eta
index 900ae89c..3d2a644c 100644
--- a/templates/modular/http-client.eta
+++ b/templates/modular/http-client.eta
@@ -171,7 +171,7 @@ export class HttpClient<SecurityDataType = unknown> {
         {
             ...requestParams,
             headers: {
-            ...(type ? { "Content-Type": type } : {}),
+            ...(type && type !== ContentType.FormData ? { "Content-Type": type } : {}),
             ...(requestParams.headers || {}),
             },
             signal: cancelToken ? this.createAbortSignal(cancelToken) : void 0,