diff --git a/src/reader_native.cpp b/src/reader_native.cpp
index dbecab8ea8..ce49022297 100644
--- a/src/reader_native.cpp
+++ b/src/reader_native.cpp
@@ -38,6 +38,8 @@ ReaderNative::ReaderNative(LAMMPS *lmp) : Reader(lmp)
   fieldindex = nullptr;
   maxbuf = 0;
   databuf = nullptr;
+  magic_string = nullptr;
+  unit_style = nullptr;
 }
 
 /* ---------------------------------------------------------------------- */