Arduino 1.0.5 uint8_t issue

[OldETC]

When attempting to compile the code I get a series of errors that indicate that uint_8t is not a declared type. The typical message is:
In file included from sketch_jan07a.ino:1:0:
/home/lesh/arduino_experiments/firstattempt/libraries/Grbl/probe.h:33:1: error: 'uint8_t' does not name a type
uint8_t probe_get_state();

Is there any reason that this cannot be changed to char which appears to be the Arduino IDE type applicable?

[jesdakron]

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