diff --git a/src/GZipFile.cc b/src/GZipFile.cc
index 947c5318..2eda8f97 100644
--- a/src/GZipFile.cc
+++ b/src/GZipFile.cc
@@ -77,6 +77,7 @@ GZipFile::GZipFile(const char* filename, const char* mode)
 
 GZipFile::~GZipFile()
 {
+  close();
   free(buf_);
 }