diff --git a/PowerEditor/src/WinControls/TreeView/TreeView.cpp b/PowerEditor/src/WinControls/TreeView/TreeView.cpp
index 874b3f48b..c0f5ee95c 100644
--- a/PowerEditor/src/WinControls/TreeView/TreeView.cpp
+++ b/PowerEditor/src/WinControls/TreeView/TreeView.cpp
@@ -285,7 +285,10 @@ BOOL TreeView::setImageList(int w, int h, int nbImage, int image_id, ...)
 
 		hbmp = (HBITMAP)::LoadImage(_hInst, MAKEINTRESOURCE(imageID), IMAGE_BITMAP, bmDpiDynW, bmDpiDynH, 0);
 		if (hbmp == NULL)
+		{
+			va_end(argLst);
 			return FALSE;
+		}
 		ImageList_AddMasked(_hImaLst, hbmp, maskColour);
 		DeleteObject(hbmp);
 	}