diff --git a/os/common/ports/ARM-common/chtypes.h b/os/common/ports/ARM-common/chtypes.h
index 734819aca..526e77a5f 100644
--- a/os/common/ports/ARM-common/chtypes.h
+++ b/os/common/ports/ARM-common/chtypes.h
@@ -36,6 +36,7 @@
 
 /**
  * @name    Architecture data constraints
+ * @{
  */
 #define PORT_ARCH_SIZEOF_DATA_PTR   4
 #define PORT_ARCH_SIZEOF_CODE_PTR   4
diff --git a/os/common/ports/templates/chtypes.h b/os/common/ports/templates/chtypes.h
index 4409e973f..72db112f4 100644
--- a/os/common/ports/templates/chtypes.h
+++ b/os/common/ports/templates/chtypes.h
@@ -36,6 +36,7 @@
 
 /**
  * @name    Architecture data constraints
+ * @{
  */
 #define PORT_ARCH_SIZEOF_DATA_PTR   4
 #define PORT_ARCH_SIZEOF_CODE_PTR   4