diff --git a/tools/toolchains/arm.py b/tools/toolchains/arm.py
index 506d67ffcd9..df615a8d154 100644
--- a/tools/toolchains/arm.py
+++ b/tools/toolchains/arm.py
@@ -430,6 +430,7 @@ def __init__(self, target, *args, **kwargs):
             self.flags['common'].append("-mfloat-abi=hard")
             self.flags['ld'].append("--cpu=cortex-m33.no_dsp")
         elif core == "Cortex-M33":
+            self.flags['common'].append("-mfpu=none")
             self.flags['ld'].append("--cpu=cortex-m33.no_dsp.no_fp")
         else:
             self.flags['ld'].append("--cpu=%s" % cpu)