Add header guard to ruby.h.split

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ruby.h b/src/ruby.h
index 343583dd..dd5dce29 100644
--- a/src/ruby.h
+++ b/src/ruby.h
@@ -32,6 +32,10 @@
 */
 
 
+#ifndef LIBDCP_RUBY_H
+#define LIBDCP_RUBY_H
+
+
 #include <string>
 
 
@@ -69,3 +73,6 @@ bool operator!=(Ruby const& a, Ruby const& b);
 
 }
 
+
+#endif
+