--- sfftobmp-3.1.orig/src/input.cpp
+++ sfftobmp-3.1/src/input.cpp
@@ -36,6 +36,7 @@
 
 ---RCS-Info--------------------------------------------------*/
 
+#include <cstring>
 #include <vector>
 #include <iostream>
 
--- sfftobmp-3.1.orig/src/output.cpp
+++ sfftobmp-3.1/src/output.cpp
@@ -37,6 +37,7 @@
 
 ---RCS-Info--------------------------------------------------*/
 
+#include <cstring>
 #include <cassert>
 #include <iostream>