1 files changed, 1 insertions, 0 deletions

diff --git a/random.c b/random.c
index 547274a..dad2c0e 100644
--- a/random.c
+++ b/random.c
@@ -11,6 +11,7 @@
  */
 
 #include <assert.h>
+#include <string.h>
 
 #include "puzzles.h"