diff --git a/simgear/package/untar.cxx b/simgear/package/untar.cxx
index ee8b7178..7698029d 100644
--- a/simgear/package/untar.cxx
+++ b/simgear/package/untar.cxx
@@ -22,6 +22,7 @@
 #include <stdint.h>
 #include <cstring>
 #include <cstddef>
+#include <algorithm>
 
 #include <zlib.h>