1 files changed, 1 insertions, 0 deletions

diff --git a/eqn_html.c b/eqn_html.c
index c8d5b6f7..d1c7b665 100644
--- a/eqn_html.c
+++ b/eqn_html.c
@@ -26,6 +26,7 @@
 #include <string.h>
 
 #include "mandoc.h"
+#include "eqn.h"
 #include "out.h"
 #include "html.h"