Index: /trunk/src/VBox/Main/src-server/NATEngineImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/NATEngineImpl.cpp	(revision 64192)
+++ /trunk/src/VBox/Main/src-server/NATEngineImpl.cpp	(revision 64193)
@@ -22,5 +22,4 @@
 #include "GuestOSTypeImpl.h"
 
-#include <iprt/ctype.h>
 #include <iprt/string.h>
 #include <iprt/cpp/utils.h>
@@ -271,8 +270,4 @@
         for (s = name.c_str(); (c = *s) != '\0'; ++s)
         {
-            if (RT_C_IS_SPACE(c))
-                return setError(E_INVALIDARG,
-                                tr("Whitespace in NAT rule name"));
-
             if (c == ',') /* we use csv in several places e.g. GetRedirects or natpf<N> argument */
                 return setError(E_INVALIDARG,