diff --git a/indra/newview/llfloatermodelpreview.cpp b/indra/newview/llfloatermodelpreview.cpp
index 4f1ea4a89ea008cc830b7b0c294736beae50fc01..cb58cfdd0aafb30acc5d229fc3de9a2e14c0fd0c 100644
--- a/indra/newview/llfloatermodelpreview.cpp
+++ b/indra/newview/llfloatermodelpreview.cpp
@@ -325,6 +325,8 @@ BOOL LLFloaterModelPreview::postBuild()
 	childSetCommitCallback("import_scale", onImportScaleCommit, this);
 	childSetCommitCallback("pelvis_offset", onPelvisOffsetCommit, this);
 
+	getChild<LLLineEditor>("description_form")->setKeystrokeCallback(boost::bind(&LLFloaterModelPreview::onDescriptionKeystroke, this, _1), NULL);
+
 	getChild<LLCheckBoxCtrl>("show_edges")->setCommitCallback(boost::bind(&LLFloaterModelPreview::onViewOptionChecked, this, _1));
 	getChild<LLCheckBoxCtrl>("show_physics")->setCommitCallback(boost::bind(&LLFloaterModelPreview::onViewOptionChecked, this, _1));
 	getChild<LLCheckBoxCtrl>("show_textures")->setCommitCallback(boost::bind(&LLFloaterModelPreview::onViewOptionChecked, this, _1));
@@ -520,6 +522,16 @@ void LLFloaterModelPreview::onClickCalculateBtn()
 	mUploadBtn->setEnabled(false);
 }
 
+void LLFloaterModelPreview::onDescriptionKeystroke(LLUICtrl* ctrl)
+{
+	// Workaround for SL-4186, server doesn't allow name changes after 'calculate' stage
+	LLLineEditor* input = static_cast<LLLineEditor*>(ctrl);
+	if (input->isDirty()) // dirty will be reset after commit
+	{
+		toggleCalculateButton(true);
+	}
+}
+
 //static
 void LLFloaterModelPreview::onImportScaleCommit(LLUICtrl*,void* userdata)
 {
diff --git a/indra/newview/llfloatermodelpreview.h b/indra/newview/llfloatermodelpreview.h
index 7ec6a58ac76de31e44812a630f19edbc3b961307..edc90d1695176aa3859ff656e84daef8b9d97c5b 100644
--- a/indra/newview/llfloatermodelpreview.h
+++ b/indra/newview/llfloatermodelpreview.h
@@ -137,7 +137,9 @@ class LLFloaterModelPreview : public LLFloaterModelUploadBase
 	friend class LLModelPreview;
 	friend class LLMeshFilePicker;
 	friend class LLPhysicsDecomp;
-	
+
+	void		onDescriptionKeystroke(LLUICtrl*);
+
 	static void		onImportScaleCommit(LLUICtrl*, void*);
 	static void		onPelvisOffsetCommit(LLUICtrl*, void*);
 	static void		onUploadJointsCommit(LLUICtrl*,void*);