diff --git a/daemon/bencode.c b/daemon/bencode.c
index 934b59cfa..bd019913e 100644
--- a/daemon/bencode.c
+++ b/daemon/bencode.c
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <string.h>
-
+#include <ctype.h>
 
 /* set to 0 for alloc debugging, e.g. through valgrind */
 #define BENCODE_MIN_BUFFER_PIECE_LEN	512