diff --git a/pdf.c b/pdf.c
index eae4b047abc483461bd361038a190391e396f3c5..2cb5cd9c9ec6fff53023b4cd524afa4c917090d8 100644
--- a/pdf.c
+++ b/pdf.c
@@ -1169,11 +1169,13 @@ act_rldstring(const HParseResult *p, void *u)
 
 /*
  * The following functions implement a fix for being able to exhaust memory by nesting strings, objects and dicts too deeply.
- * A counter in aux for each type is incremented on each opening token, and decremented on each closing token. The counter is not decremented when it is 0 to avoid underflow.
- *
- * The counter is global across the document (but respects document structure, e.g. parentheses in streams don't count, unless for some reason they're parsed with the lparen rule.)
- * The validations make the parse fail if this nesting depth is exceeded. Because currently there are no diagnostic messages, this can probably result in unexpected parses.
+ * A counter in aux (separately for each type of nesting) is incremented on each opening token, and decremented on each closing token. 
+ * The counters are not decremented when it is 0 to avoid underflow.
  *
+ * The counters are global across the document (but respect document structure,
+ * e.g. parentheses in streams don't count, unless for some reason they're parsed with the lparen rule.)
+ * The validations make the parse fail if this nesting depth is exceeded.
+ * Because currently there are no diagnostic messages, this can probably result in unexpected parses.
  */
 
 #define PAREN_MAX_NEST_DEPTH 256