Including <sstring> header - file not found?

I am using stringstreams in one file of my project, and can't seem to include the header file for them: (`#include <sstream>`). The error message given is: ``` /Users/lee/..../fasta_reader.cpp:13:10: fatal error: 'sstring' file not found [2] #include <sstring> ^ ``` Many other SC++L and STL headers are included, and are all found properly from the expected location:`/Developer/SDKs/MacOSX10.7.sdk/usr/include/c++/4.2.1`. Here's what I have verified: - Include directory configuration: Other standard header files, such as are being included from the same location. - Header file permissions: sstring and string have identical permissions, and are in the same location. string is successfully included, but not sstring - Moving the #include location to before or after all other header files - Clean build / recompile doesn't help. What else should I try? EDIT: Found the solution- I mistyped `#include <sstring>` rather than `#include <sstream>`.