diff --git a/.changeset/red-rings-walk.md b/.changeset/red-rings-walk.md
new file mode 100644
index 0000000000..5e61c37fe9
--- /dev/null
+++ b/.changeset/red-rings-walk.md
@@ -0,0 +1,5 @@
+---
+"@hey-api/openapi-ts": patch
+---
+
+fix(axios): set content type to multipart/form-data when using form data
diff --git a/src/templates/core/axios/getHeaders.hbs b/src/templates/core/axios/getHeaders.hbs
index a2386d30f2..44eb7c8602 100644
--- a/src/templates/core/axios/getHeaders.hbs
+++ b/src/templates/core/axios/getHeaders.hbs
@@ -36,6 +36,8 @@ export const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptio
 		} else if (!isFormData(options.body)) {
 			headers['Content-Type'] = 'application/json';
 		}
+	} else if (options.formData !== undefined) {
+		headers['Content-Type'] = options.mediaType;
 	}
 
 	return headers;
diff --git a/test/__snapshots__/v3_axios/core/request.ts.snap b/test/__snapshots__/v3_axios/core/request.ts.snap
index 3958de2afd..d0d546b347 100644
--- a/test/__snapshots__/v3_axios/core/request.ts.snap
+++ b/test/__snapshots__/v3_axios/core/request.ts.snap
@@ -132,6 +132,8 @@ export const getHeaders = async (
         } else if (!isFormData(options.body)) {
             headers['Content-Type'] = 'application/json';
         }
+    } else if (options.formData !== undefined) {
+        headers['Content-Type'] = options.mediaType;
     }
 
     return headers;