Small doc fix.

doc/tutorial/debug_faq.txt

@@ -60,8 +60,8 @@ The parameter in T.dscalar('x') in the first line is the name of this variable(i
 The function I compiled is too slow, what's up?
 -----------------------------------------------
 First, make sure you're running in FAST_RUN mode, by passing ``mode='FAST_RUN'``
-to ``theano.function`` or ``theano.make`` or by setting to ``PROFILE_MODE`` 
-the flags :attr:`config.mode`. Some
+to ``theano.function`` or ``theano.make`` or by setting to ``FAST_RUN``
+the flag :attr:`config.mode`. Some
 operations have excruciatingly slow Python implementations and that
 can negatively effect the performance of FAST_COMPILE.