1 files changed, 1 insertions, 0 deletions
diff --git a/marshal.c b/marshal.c
index 24453c1d2d..997a7201f2 100644
--- a/marshal.c
+++ b/marshal.c
@@ -17,6 +17,7 @@
 #include "ruby/io.h"
 #include "ruby/st.h"
 #include "ruby/util.h"
+#include "encindex.h"
 #include "id_table.h"
 
 #include <math.h>