diff --git a/indra/newview/llfloatermodelpreview.cpp b/indra/newview/llfloatermodelpreview.cpp
index ab370a221f..d5619f5259 100755
--- a/indra/newview/llfloatermodelpreview.cpp
+++ b/indra/newview/llfloatermodelpreview.cpp
@@ -602,6 +602,8 @@ void LLFloaterModelPreview::onImportScaleCommit(LLUICtrl*,void* userdata)
 		return;
 	}
 
+	fp->mModelPreview->mDirty = true;
+
 	fp->toggleCalculateButton(true);
 
 	fp->mModelPreview->refresh();
@@ -616,6 +618,8 @@ void LLFloaterModelPreview::onPelvisOffsetCommit( LLUICtrl*, void* userdata )
 		return;
 	}
 
+	fp->mModelPreview->mDirty = true;
+
 	fp->toggleCalculateButton(true);
 
 	fp->mModelPreview->refresh();