diff --git a/kcgijson.h b/kcgijson.h
index cb9a560..1f3501b 100644
--- a/kcgijson.h
+++ b/kcgijson.h
@@ -39,6 +39,10 @@ enum	kjsontype {
 	KJSON_STRING
 };
 
+/*
+ * The maximum number of JSON scopes allowed.
+ * Once this has been reached, new scopes will return KCGI_ENOMEM.
+ */
 #define	KJSON_STACK_MAX	128
 
 struct	kjsonscope {
diff --git a/man/kjson_array_open.3 b/man/kjson_array_open.3
index 2a90d3b..56680dd 100644
--- a/man/kjson_array_open.3
+++ b/man/kjson_array_open.3
@@ -72,7 +72,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with
diff --git a/man/kjson_obj_open.3 b/man/kjson_obj_open.3
index 631b6a6..b20f06f 100644
--- a/man/kjson_obj_open.3
+++ b/man/kjson_obj_open.3
@@ -72,7 +72,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with
diff --git a/man/kjson_string_open.3 b/man/kjson_string_open.3
index e419383..7b8ebc1 100644
--- a/man/kjson_string_open.3
+++ b/man/kjson_string_open.3
@@ -73,7 +73,8 @@ indicating the error state.
 .It Dv KCGI_OK
 Success (not an error).
 .It Dv KCGI_ENOMEM
-Internal memory allocation failure.
+Internal memory allocation failure, including reaching the maximum
+number of possible JSON scopes.
 .It Dv KCGI_HUP
 The output connection has been terminated.
 For FastCGI connections, the current connection should be released with