1 files changed, 3 insertions, 0 deletions
diff --git a/ruby.h b/ruby.h
index 4c1cd148d6..dcb38f4a71 100644
--- a/ruby.h
+++ b/ruby.h
@@ -22,6 +22,9 @@ extern "C" {
 #endif
 
 #include "config.h"
+#ifdef RUBY_EXTCONF_H
+#include RUBY_EXTCONF_H
+#endif
 #include "defines.h"
 
 #ifdef HAVE_STDLIB_H