diff --git a/data/inputs/silane.cti b/data/inputs/silane.cti
index 5f1af3268..3a8addbe9 100644
--- a/data/inputs/silane.cti
+++ b/data/inputs/silane.cti
@@ -1,4 +1,3 @@
-convert_ck: debug = 0
 #
 # Generated from file silane.inp
 # by ck2cti on Mon Sep 20 14:24:48 2004
diff --git a/ext/tpx/Sub.cpp b/ext/tpx/Sub.cpp
index 2c3f10422..1fb8ed6c9 100755
--- a/ext/tpx/Sub.cpp
+++ b/ext/tpx/Sub.cpp
@@ -5,6 +5,7 @@
 #include "Sub.h"
 #include <math.h>
 #include <fstream>
+#include <stdio.h>
 
 namespace tpx {
 
diff --git a/ext/tpx/utils.cpp b/ext/tpx/utils.cpp
index 05fddf3ed..369ac1f21 100755
--- a/ext/tpx/utils.cpp
+++ b/ext/tpx/utils.cpp
@@ -6,7 +6,7 @@ namespace tpx {
     static string lowercase(string s) {
         size_t i, n = s.size();
         string lc(s);
-        for (int i = 0; i < n; i++) lc[i] = tolower(s[i]);
+        for (i = 0; i < n; i++) lc[i] = tolower(s[i]);
         return lc;
     }