diff --git a/Include/internal/pycore_obmalloc.h b/Include/internal/pycore_obmalloc.h
index 9140d8f08f0af1..4ef32cf3e64847 100644
--- a/Include/internal/pycore_obmalloc.h
+++ b/Include/internal/pycore_obmalloc.h
@@ -250,13 +250,13 @@ typedef unsigned int pymem_uint;  /* assuming >= 16 bits */
 /* When you say memory, my mind reasons in terms of (pointers to) blocks */
 typedef uint8_t pymem_block;
 
-/* Pool for small blocks. */
+/* Pool for small blocks (see "Pool table" below for details). */
 struct pool_header {
     union { pymem_block *_padding;
             uint count; } ref;          /* number of allocated blocks    */
     pymem_block *freeblock;             /* pool's free list head         */
     struct pool_header *nextpool;       /* next pool of this size class  */
-    struct pool_header *prevpool;       /* previous pool       ""        */
+    struct pool_header *prevpool;       /* previous pool ""              */
     uint arenaindex;                    /* index into arenas of base adr */
     uint szidx;                         /* block size class index        */
     uint nextoffset;                    /* bytes to virgin block         */