diff --git a/os/ports/common/ARMCMx/port.dox b/os/ports/common/ARMCMx/port.dox
index 52b58ffd7..3f12ea1e5 100644
--- a/os/ports/common/ARMCMx/port.dox
+++ b/os/ports/common/ARMCMx/port.dox
@@ -19,7 +19,7 @@
 */
 
 /**
- * @defgroup COMMON_ARMCMx ARM Cortex-Mx
+ * @defgroup COMMON_ARMCMx ARM Cortex-Mx Common Code
  * @ingroup port_common
  */