diff --git a/tools/toolchains/gcc.py b/tools/toolchains/gcc.py
index 95e55747c2..b8adde954b 100644
--- a/tools/toolchains/gcc.py
+++ b/tools/toolchains/gcc.py
@@ -61,10 +61,8 @@ class GCC(mbedToolchain):
         elif target.core.startswith("Cortex-M23"):
             self.cpu = ["-mcpu=cortex-m23"]
         elif target.core.startswith("Cortex-M33F"):
-            self.cpu = ["-mcpu=cortex-m33"]
             self.cpu = ["-mcpu=cortex-m33+nodsp"]
         elif target.core.startswith("Cortex-M33"):
-            self.cpu = ["-mcpu=cortex-m33"]
             self.cpu = ["-mcpu=cortex-m33+nodsp+nofp"]
         else:
             self.cpu = ["-mcpu={}".format(target.core.lower())]