diff --git a/pysegcnn/core/utils.py b/pysegcnn/core/utils.py
index 05634dada242bd25a816b0044f0999004533db60..e249e0765c8929a16fb2155c95e47b4845113331 100644
--- a/pysegcnn/core/utils.py
+++ b/pysegcnn/core/utils.py
@@ -541,6 +541,8 @@ def stack_tifs(filename, tifs, **kwargs):
     gdal.PushErrorHandler('CPLQuietErrorHandler')
     gdal.Translate(str(filename), vrt_ds, **kwargs)
 
+    del vrt_ds
+
     return