diff --git a/tools/toolchains/mbed_toolchain.py b/tools/toolchains/mbed_toolchain.py
index 019ced616b..bf2718428f 100755
--- a/tools/toolchains/mbed_toolchain.py
+++ b/tools/toolchains/mbed_toolchain.py
@@ -894,6 +894,10 @@ class mbedToolchain(with_metaclass(ABCMeta, object)):
     def add_regions(self):
         """Add regions to the build profile, if there are any.
         """
+
+        if not getattr(self.target, "bootloader_supported", False):
+            return
+
         if self.config.has_regions:
             regions = list(self.config.regions)
             regions.sort(key=lambda x: x.start)
@@ -913,6 +917,7 @@ class mbedToolchain(with_metaclass(ABCMeta, object)):
 
         Region = namedtuple("Region", "name start size")
 
+
         # Add all available ROM regions to build profile
         if not getattr(self.target, "static_memory_defines", False):
             raise ConfigException()
@@ -926,7 +931,6 @@ class mbedToolchain(with_metaclass(ABCMeta, object)):
                 True,
                 suffixes=["_START", "_SIZE"]
             )
-
         # Add all available RAM regions to build profile
         if not getattr(self.target, "static_memory_defines", False):
             raise ConfigException()
@@ -941,7 +945,6 @@ class mbedToolchain(with_metaclass(ABCMeta, object)):
                 suffixes=["_START", "_SIZE"]
             )
 
-
     STACK_PARAM = "target.boot-stack-size"
     TFM_LVL_PARAM = "tfm.level"
     XIP_ENABLE_PARAM = "target.xip-enable"