diff --git speech_tools.orig/base_class/EST_TSimpleMatrix.cc speech_tools/base_class/EST_TSimpleMatrix.cc
index 3a7c47e..7b8ffb1 100644
--- speech_tools.orig/base_class/EST_TSimpleMatrix.cc
+++ speech_tools/base_class/EST_TSimpleMatrix.cc
@@ -44,6 +44,7 @@
 #include "EST_TVector.h"
 #include <fstream>
 #include <iostream>
+#include <cstring>
 #include "EST_cutils.h"
 #include <string.h>
 
@@ -52,7 +53,7 @@ void EST_TSimpleMatrix<T>::copy_data(const EST_TSimpleMatrix<T> &a)
 {
     
   if (!a.p_sub_matrix && !this->p_sub_matrix)
-    memcpy((void *)&this->a_no_check(0,0),
+    std::memcpy((void *)&this->a_no_check(0,0),
 	   (const void *)&a.a_no_check(0,0),
 	   this->num_rows()*this->num_columns()*sizeof(T)
 	   );
diff --git speech_tools.orig/base_class/EST_TSimpleVector.cc speech_tools/base_class/EST_TSimpleVector.cc
index 5539594..38b313c 100644
--- speech_tools.orig/base_class/EST_TSimpleVector.cc
+++ speech_tools/base_class/EST_TSimpleVector.cc
@@ -43,6 +43,7 @@
 #include "EST_TSimpleVector.h"
 #include "EST_matrix_support.h"
 #include <fstream>
+#include <cstring>
 #include "EST_cutils.h"
 #include <string.h>
 
@@ -51,7 +52,7 @@ template<class T> void EST_TSimpleVector<T>::copy(const EST_TSimpleVector<T> &a)
   if (this->p_column_step==1 && a.p_column_step==1)
     {
     resize(a.n(), FALSE);
-    memcpy((void *)(this->p_memory), (const void *)(a.p_memory), this->n() * sizeof(T));
+    std::memcpy((void *)(this->p_memory), (const void *)(a.p_memory), this->n() * sizeof(T));
     }
 else
   ((EST_TVector<T> *)this)->copy(a);
@@ -141,7 +142,7 @@ template<class T> EST_TSimpleVector<T> &EST_TSimpleVector<T>::operator=(const ES
 template<class T> void EST_TSimpleVector<T>::zero()
 {
   if (this->p_column_step==1)
-    memset((void *)(this->p_memory), 0, this->n() * sizeof(T));
+    std::memset((void *)(this->p_memory), 0, this->n() * sizeof(T));
   else
     ((EST_TVector<T> *)this)->fill(*this->def_val);
 }