C preprocessor with if statement

I have the following macro:

#define IF_TRACE_ENABLED(level)  if (IsTraceEnabled(level))

The user code should look following:

IF_TRACE_ENABLED(LEVEL1)
{
    ... some very smart code
}

The emphasis here on curly brackets - I want to prevent "if" from macro to "eat" other code:

if (...)
   IF_TRACE_ENABLED(LEVEL1)
      printf(....);
else
   bla bla bla

In this example IF_TRACE_ENABLED "eats" else block.

Is there way to enforce user code not compile without curly brakes or there are other to define the macro to achieve the safety?