diff --git a/src/main/beos/SDL_BeApp.cc b/src/main/beos/SDL_BeApp.cc
index bbc7f8fea..a26f760d0 100644
--- a/src/main/beos/SDL_BeApp.cc
+++ b/src/main/beos/SDL_BeApp.cc
@@ -31,6 +31,7 @@ static char rcsid =
 #include <storage/Path.h>
 #include <storage/Entry.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
 #include "SDL_BeApp.h"