diff --git a/ortools/base/gzipstring.h b/ortools/base/gzipstring.h
index 1863009f424..5c239ceb4d6 100644
--- a/ortools/base/gzipstring.h
+++ b/ortools/base/gzipstring.h
@@ -31,7 +31,7 @@ bool GunzipString(absl::string_view str, std::string* out) {
     return false;
   }
 
-  zs.next_in = static_cast<Bytef*>(str.data());
+  zs.next_in = (Bytef*)str.data();
   zs.avail_in = str.size();
 
   int status;