1 files changed, 1 insertions, 0 deletions

diff --git a/mutex.c b/mutex.c
index 0df939b..f4fb4f9 100644
--- a/mutex.c
+++ b/mutex.c
@@ -6,6 +6,7 @@
  */
 
 #include "pthread.h"
+#include "implement.h"
 
 static int
 insert_attr(pthread_mutexattr_t *attr)