diff --git a/progs/tools/trace/gltrace_support.cc b/progs/tools/trace/gltrace_support.cc
index b188e73..0b76d32 100644
--- a/progs/tools/trace/gltrace_support.cc
+++ b/progs/tools/trace/gltrace_support.cc
@@ -20,6 +20,8 @@
  */
 
 #include "gltrace_support.h"
+#include <cstdlib>
+#include <cstring>
 #include <assert.h>
 #include <sstream>
 #include <fstream>
@@ -136,7 +138,7 @@ namespace gltrace {
 
     struct timeval now;
     struct tm t;
-    static char *months[12] = 
+    static char const *months[12] = 
       { 
 	"Jan", "Feb", "Mar", "Apr", "May", "Jun", 
 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"