diff --git a/apex.h b/apex.h
index 7279589..c7dd71e 100644
--- a/apex.h
+++ b/apex.h
@@ -22,9 +22,10 @@
 
 #define APEX_EXTENDED_SHIFT 63 /* Extended address bit position. */
 
-/* Addresses are 2^3=8 bytes each. */
-/* page in second level page table */
-/* holds APEX_PAGE_SIZE/8 addresses  */
+/*
+ * Addresses are 2^3=8 bytes each. Page in second level page table holds
+ * APEX_PAGE_SIZE/8 addresses.
+ */
 #define APEX_ADDR_SHIFT 3
 #define APEX_LEVEL_SHIFT (APEX_PAGE_SHIFT - APEX_ADDR_SHIFT)
 #define APEX_LEVEL_SIZE BIT(APEX_LEVEL_SHIFT)