diff --git a/Client/src/common/AMCApplication.js b/Client/src/common/AMCApplication.js
index 5a03c470..3bd16843 100644
--- a/Client/src/common/AMCApplication.js
+++ b/Client/src/common/AMCApplication.js
@@ -561,7 +561,7 @@ export default class AMCApplication extends Common.AMCObject {
 		formData.append("size", chunkData.byteLength);
 		formData.append("offset", uploadOffset);
 		formData.append("data", new Blob([chunkData], {
-                        type: "application/3mf"
+                        type: uploadObject.getMimeType ()
                     }), uploadObject.getFileName ());
 
 		application.axiosPostFormData("/upload/" + uploadObject.streamuuid, formData)
@@ -689,7 +689,7 @@ export default class AMCApplication extends Common.AMCObject {
 		formData.append("size", chunkData.byteLength);
 		formData.append("offset", uploadOffset);
 		formData.append("data", new Blob([chunkData], {
-                        type: "application/3mf"
+                        type: uploadObject.getMimeType ()
                     }), uploadObject.getFileName ());
 
 		application.axiosPostFormData("/upload/" + uploadObject.streamuuid, formData)
diff --git a/Client/src/common/AMCImplementation_Upload.js b/Client/src/common/AMCImplementation_Upload.js
index 217d59dd..77bfe5ba 100644
--- a/Client/src/common/AMCImplementation_Upload.js
+++ b/Client/src/common/AMCImplementation_Upload.js
@@ -191,7 +191,12 @@ export default class AMCUpload extends Common.AMCObject {
 	{
 		return this.sha256sum;		
 	}
-	
+
+	getMimeType ()
+	{
+		return this.itemState.getMimeType();
+	}
+
 	checkIfUploadIsActive ()
 	{
 		if (this.itemState) {