diff --git a/doc/contributions.txt b/doc/contributions.txt
index 0035d4f597ef2dcb955086e18ae3d8aa34ef1a08..4e3ce70e0bc1ee7ec371c10db2dfb1ecb2cf33d5 100755
--- a/doc/contributions.txt
+++ b/doc/contributions.txt
@@ -1122,6 +1122,7 @@ Slee Mayo
 snowy Sidran
 Sovereign Engineer
     MAINT-2334
+    OPEN-189
 SpacedOut Frye
 	VWR-34
 	VWR-45
diff --git a/indra/llwindow/llwindowmacosx-objc.h b/indra/llwindow/llwindowmacosx-objc.h
index 32b3bfb078a9e6dddb19651a9d50cfaf84a3fa6e..3b6295fba88f23ce78036a0627705e4e250929de 100755
--- a/indra/llwindow/llwindowmacosx-objc.h
+++ b/indra/llwindow/llwindowmacosx-objc.h
@@ -25,6 +25,9 @@
  * $/LicenseInfo$
  */
 
+#ifndef LL_LLWINDOWMACOSX_OBJC_H
+#define LL_LLWINDOWMACOSX_OBJC_H
+
 #include <map>
 #include <vector>
 
@@ -143,3 +146,5 @@ NSWindowRef getMainAppWindow();
 GLViewRef getGLView();
 
 unsigned int getModifiers();
+
+#endif // LL_LLWINDOWMACOSX_OBJC_H