diff --git a/Demos3/SimpleOpenGL3/premake4.lua b/Demos3/SimpleOpenGL3/premake4.lua
index a413f1c93..bb5b27f56 100644
--- a/Demos3/SimpleOpenGL3/premake4.lua
+++ b/Demos3/SimpleOpenGL3/premake4.lua
@@ -27,3 +27,6 @@
 
 		}
 
+if os.is("MacOSX") then
+                        links{"Cocoa.framework"}
+end
diff --git a/btgui/OpenGLWindow/premake4.lua b/btgui/OpenGLWindow/premake4.lua
index 59c17fdf0..be45bbe0d 100644
--- a/btgui/OpenGLWindow/premake4.lua
+++ b/btgui/OpenGLWindow/premake4.lua
@@ -20,7 +20,6 @@
 		files {
 			"**.cpp",
 			"**.h",
-			"**.c"
 		}
 
 		if not os.is("Windows") then 
@@ -38,9 +37,7 @@
 			}
 		end
 		if os.is("MacOSX") then
-			links{"Cocoa.framework"}
-		else
-			excludes
+			files
 			{
 					"../OpenGLWindow/MacOpenGLWindow.h",
 					"../OpenGLWindow/MacOpenGLWindow.mm",