diff --git a/bsp/tm4c129x/libraries/SConscript b/bsp/tm4c129x/libraries/SConscript
index 8b48a34c7d..d1ed0b9383 100644
--- a/bsp/tm4c129x/libraries/SConscript
+++ b/bsp/tm4c129x/libraries/SConscript
@@ -18,12 +18,6 @@ elif rtconfig.CROSS_TOOL == 'iar':
 CPPPATH = [cwd, cwd + '/inc', cwd + '/driverlib']
 
 CPPDEFINES = [rtconfig.PART_TYPE]
-if rtconfig.CROSS_TOOL == 'gcc':
-	CPPDEFINES += ['gcc'];
-	CPPDEFINES += ['uint_fast8_t=uint32_t'];
-	CPPDEFINES += ['uint_fast32_t=uint32_t'];
-	CPPDEFINES += ['int_fast8_t=int32_t'];
-	CPPDEFINES += ['uint_fast16_t=uint32_t'];
 group = DefineGroup('Libraries', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
 
 Return('group')