diff --git a/src/screenimage.cpp b/src/screenimage.cpp
index 644b178..77ba256 100644
--- a/src/screenimage.cpp
+++ b/src/screenimage.cpp
@@ -25,6 +25,7 @@
 #include <ctime>
 #include <sstream>
 #include <cstdio>
+#include <cstring>
 
 static const char* power =
         " @@@@    @@@   @    @    @  @@@@@  @@@@ "