diff --git a/tools/binary2txt.cpp b/tools/binary2txt.cpp
index 3662a6da1b51251cab1863f54672073c9a6dbab0..e0778fbf3c6c6eae52793748be6efa15e7098449 100644
--- a/tools/binary2txt.cpp
+++ b/tools/binary2txt.cpp
@@ -19,8 +19,8 @@
 // Syntax: binary2txt file1 file2 ...
 // Creates:           file1.txt file2.txt ...
 
-#include "stdio.h"
-#include "string.h"
+#include <stdio.h>
+#include <string.h>
 
 // these must match settings in src/lmptype.h which builds LAMMPS with
 //   -DLAMMPS_SMALLBIG (the default), -DLAMMPS_BIGBIG, or -DLAMMPS_SMALLSMALL