1 files changed, 1 insertions, 0 deletions

diff --git a/src/ctx.h b/src/ctx.h
index 3ad7f85..6c4ef33 100644
--- a/src/ctx.h
+++ b/src/ctx.h
@@ -24,6 +24,7 @@
 #include "bftw.h"
 #include "trie.h"
 #include <stdbool.h>
+#include <stddef.h>
 #include <sys/resource.h>
 
 /**