--- a/README	Fri Mar 14 18:35:41 2008 -0400
+++ b/README	Fri Mar 14 20:21:15 2008 -0400
@@ -1,6 +1,6 @@
 Dependencies
   CGAL-3.3 -    for alpha-shapes and kinetic data structures
-  DSR-PDB -     for reading in PDB files
+  DSR-PDB -     for reading in PDB files (if use_dsrpdb is turned on in cmake)
   CMake -       for controlling the build process
   boost -       great set of C++ libraries
   Doxygen -     for building documentation
@@ -21,9 +21,10 @@
   
   In the cmake line you can provide -Ddebug:bool=on to turn on debugging,
   -Dcounters:bool=on to turn on counters, -Doptimize:bool=on to turn on
-  optimization.  Depending on the combination of debugging and optimization, a
-  particular CMAKE_CXX_FLAGS* is chosen.  All of this can be set using a text
-  user interface by running ccmake instead of cmake.
+  optimization, -Duse_dsrpdb:bool=on to turn on reading PDB files.  Depending on
+  the combination of debugging and optimization, a particular CMAKE_CXX_FLAGS*
+  is chosen.  All of this can be set using a text user interface by running
+  ccmake instead of cmake.
 
 Author
   Dmitriy Morozov <morozov@cs.duke.edu>