1 files changed, 1 insertions, 0 deletions

diff --git a/tree.c b/tree.c
index 29019a0b..1156a0d7 100644
--- a/tree.c
+++ b/tree.c
@@ -24,6 +24,7 @@
 #include <time.h>
 
 #include "mandoc.h"
+#include "regs.h"
 #include "mdoc.h"
 #include "man.h"
 #include "main.h"