--- gspeakers-0.11-orig/src/filterlinkframe.cc
+++ gspeakers-0.11/src/filterlinkframe.cc
@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <fstream>
 #include <sstream>
+#include <cstring>
 #include "filterlinkframe.h"
 #include "gspeakersplot.h"
 #include "common.h"
--- gspeakers-0.11-orig/src/freqrespeditor.cc
+++ gspeakers-0.11/src/freqrespeditor.cc
@@ -20,6 +20,7 @@
 #include "freqrespeditor.h"
 #include <fstream>
 #include <stdio.h>
+#include <cstring>
 #include <gtkmm/stock.h>
 #include <gtkmm/frame.h>
 #include <gtkmm/messagedialog.h>
--- gspeakers-0.11-orig/src/popupentry.cc
+++ gspeakers-0.11/src/popupentry.cc
@@ -26,6 +26,7 @@
 #include <gtkmm.h>
 #include <gtk/gtkentry.h> /* see XXX below */
 #include <iostream>
+#include <cstring>
 
 using namespace std;
 
--- gspeakers-0.11-orig/src/speakereditor.cc
+++ gspeakers-0.11/src/speakereditor.cc
@@ -18,6 +18,7 @@
 */
 
 #include <fstream>
+#include <cstring>
 #include <math.h>
 #include "speakereditor.h"
 #include "common.h"
--- gspeakers-0.11-orig/src/summedfreqrespplot.cc
+++ gspeakers-0.11/src/summedfreqrespplot.cc
@@ -20,6 +20,7 @@
  */
 
 #include <fstream>
+#include <cstring>
 #include <math.h>
 #include "summedfreqrespplot.h"
 #include "net.h"