1 files changed, 4 insertions, 0 deletions
diff --git a/ace/SString.h b/ace/SString.h
index f31f1df3e9b..80f6b4cb302 100644
--- a/ace/SString.h
+++ b/ace/SString.h
@@ -19,6 +19,10 @@
 
 #include "ace/ACE.h"
 
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
 // Forward decl.
 class ACE_Allocator;