1 files changed, 1 insertions, 0 deletions

diff --git a/vector.h b/vector.h
index 0d00d4f..6756fa1 100644
--- a/vector.h
+++ b/vector.h
@@ -2,6 +2,7 @@
 #define VECTOR_H
 
 #include <stddef.h>
+#include <stdbool.h>
 
 #define vector_at(v, i) ((v)->xs[(i)])