diff --git a/tools/python/mbed_tools/build/_internal/config/config.py b/tools/python/mbed_tools/build/_internal/config/config.py
index 7444c9324aa..946bb74a258 100644
--- a/tools/python/mbed_tools/build/_internal/config/config.py
+++ b/tools/python/mbed_tools/build/_internal/config/config.py
@@ -41,6 +41,11 @@ def _handle_overrides(self, overrides: Iterable[Override]) -> None:
                 _apply_override(self.data, override)
                 continue
 
+            # Support override of memory_bank_config in mbed_app.json
+            if override.namespace == "target" and override.name == "memory_bank_config":
+                _apply_override(self.data, override)
+                continue
+
             setting = next(
                 filter(
                     lambda x: x.name == override.name and x.namespace == override.namespace,