diff --git a/include/proto/channel.h b/include/proto/channel.h
index 017c5d179..a33262e21 100644
--- a/include/proto/channel.h
+++ b/include/proto/channel.h
@@ -922,6 +922,23 @@ static inline void co_skip(struct channel *chn, int len)
 	chn->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
 }
 
+/* HTX version of co_skip(). This function skips at most <len> bytes from the
+ * output of the channel <chn>. Depending on how data are stored in <htx> less
+ * than <len> bytes can be skipped. Channel flags WRITE_PARTIAL and WROTE_DATA
+ * are set.
+ */
+static inline void co_htx_skip(struct channel *chn, struct htx *htx, int len)
+{
+	struct htx_ret htxret;
+
+	htxret = htx_drain(htx, len);
+	if (htxret.ret) {
+		chn->output -= htxret.ret;
+
+		/* notify that some data was written to the SI from the buffer */
+		chn->flags |= CF_WRITE_PARTIAL | CF_WROTE_DATA;
+	}
+}
 
 /* Tries to copy chunk <chunk> into the channel's buffer after length controls.
  * The chn->o and to_forward pointers are updated. If the channel's input is