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-rw-r--r--include/ruby/ruby.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 83f68ec083..1b0b111d5e 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1442,6 +1442,10 @@ int ruby_vsnprintf(char *str, size_t n, char const *fmt, va_list ap);
#pragma GCC visibility pop
#endif
+#ifndef RUBY_DONT_SUBST
+#include "ruby/subst.h"
+#endif
+
#if defined(__cplusplus)
#if 0
{ /* satisfy cc-mode */