1 files changed, 1 insertions, 0 deletions
diff --git a/vm.c b/vm.c
index e09497dd49..f2c96eaeb0 100644
--- a/vm.c
+++ b/vm.c
@@ -12,6 +12,7 @@
 #include "ruby/ruby.h"
 #include "ruby/node.h"
 #include "ruby/st.h"
+#include "ruby/encoding.h"
 #include "gc.h"
 
 #include "insnhelper.h"