diff --git a/common.jake b/common.jake
index 7c7f18dc37..d40edfa7cd 100644
--- a/common.jake
+++ b/common.jake
@@ -488,14 +488,14 @@ global.copyManPage = function(/*String*/ name, /*int*/ section)
     {
         if (!FILE.isDirectory(manDir))
         {
-            if (!sudo(["mkdir", "-p", "-m", "0755", manDir]))
+            if (sudo(["mkdir", "-p", "-m", "0755", manDir]))
             {
                 stream.print("\0red(Unable to create the man directory.\0)");
                 OS.exit(1);
             }
         }
 
-        if (!sudo(["cp", "-f", pageFile, manDir]))
+        if (sudo(["cp", "-f", pageFile, manDir]))
             stream.print("\0red(Unable to copy the man file.\0)");
     }
 }