diff --git a/cups/ipp.c b/cups/ipp.c
index 874f62295..bc002620b 100644
--- a/cups/ipp.c
+++ b/cups/ipp.c
@@ -35,7 +35,7 @@ static char		*ipp_lang_code(const char *locale, char *buffer, size_t bufsize) _C
 static size_t		ipp_length(ipp_t *ipp, int collection);
 static ssize_t		ipp_read_file(int *fd, ipp_uchar_t *buffer, size_t length);
 static ssize_t		ipp_read_http(http_t *http, ipp_uchar_t *buffer, size_t length);
-static ipp_state_t	ipp_read_io(void *src, ipp_iocb_t cb, bool blocking, ipp_t *parent, ipp_t *ipp, int depth);
+static ipp_state_t	ipp_read_io(void *src, ipp_iocb_t cb, int blocking, ipp_t *parent, ipp_t *ipp, int depth);
 static void		ipp_set_error(ipp_status_t status, const char *format,
 			              ...);
 static _ipp_value_t	*ipp_set_value(ipp_t *ipp, ipp_attribute_t **attr,
@@ -5916,11 +5916,11 @@ ipp_read_http(http_t      *http,	/* I - Client connection */
 
 static ipp_state_t			/* O - Current state */
 ipp_read_io(void       *src,		/* I - Data source */
-            ipp_iocb_t cb,		/* I - Read callback function */
-	    bool       blocking,	/* I - Use blocking IO? */
+	    ipp_iocb_t cb,		/* I - Read callback function */
+	    int        blocking,	/* I - Use blocking IO? */
 	    ipp_t      *parent,		/* I - Parent request, if any */
-            ipp_t      *ipp,		/* I - IPP data */
-            int        depth)		/* I - Depth of collection */
+	    ipp_t      *ipp,		/* I - IPP data */
+	    int        depth)		/* I - Depth of collection */
 {
   int			n;		/* Length of data */
   unsigned char		*buffer,	/* Data buffer */
@@ -5939,7 +5939,7 @@ ipp_read_io(void       *src,		/* I - Data source */
 
   if (depth > 10)
   {
-    _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("IPP message nested too deeply."), true);
+    _cupsSetError(IPP_STATUS_ERROR_INTERNAL, _("IPP message nested too deeply."), 1);
     return (IPP_STATE_ERROR);
   }