1 files changed, 1 insertions, 0 deletions
diff --git a/uart.c b/uart.c
index 257384a..84da397 100644
--- a/uart.c
+++ b/uart.c
@@ -5,6 +5,7 @@
 #include "param.h"
 #include "traps.h"
 #include "spinlock.h"
+#include "sleeplock.h"
 #include "fs.h"
 #include "file.h"
 #include "mmu.h"