diff --git a/selfdrive/modeld/SConscript b/selfdrive/modeld/SConscript
index 10718c696b..18a90dd092 100644
--- a/selfdrive/modeld/SConscript
+++ b/selfdrive/modeld/SConscript
@@ -50,10 +50,6 @@ for pathdef, fn in {'TRANSFORM': 'transforms/transform.cl', 'LOADYUV': 'transfor
   for xenv in (lenv, lenvCython):
     xenv['CXXFLAGS'].append(f'-D{pathdef}_PATH=\\"{File(fn).abspath}\\"')
 
-if arch == "larch64" or GetOption('pc_thneed'):
-  lenvCython['CFLAGS'].append("-DUSE_THNEED")
-  lenvCython['CXXFLAGS'].append("-DUSE_THNEED")
-
 common_frameworks = []
 common_libs = envCython["LIBS"] + [gpucommon, common, 'zmq']
 if arch == "Darwin":