diff --git a/include/haproxy/mux_h2-t.h b/include/haproxy/mux_h2-t.h
index 2b9f151be..f6a034bc1 100644
--- a/include/haproxy/mux_h2-t.h
+++ b/include/haproxy/mux_h2-t.h
@@ -41,8 +41,7 @@
  */
 #define H2_CF_DEM_DALLOC        0x00000004  // demux blocked on lack of connection's demux buffer
 #define H2_CF_DEM_DFULL         0x00000008  // demux blocked on connection's demux buffer full
-
-#define H2_CF_WAIT_INLIST       0x00000010  // there is at least one stream blocked by another stream in send_list/fctl_list
+/* unused: 0x10 */
 #define H2_CF_DEM_MROOM         0x00000020  // demux blocked on lack of room in mux buffer
 #define H2_CF_DEM_SALLOC        0x00000040  // demux blocked on lack of stream's request buffer
 #define H2_CF_DEM_SFULL         0x00000080  // demux blocked on stream request buffer full
@@ -69,6 +68,7 @@
 
 #define H2_CF_ERR_PENDING       0x00800000  // A write error was detected (block sends but not reads)
 #define H2_CF_ERROR             0x01000000  //A read error was detected (handled has an abort)
+#define H2_CF_WAIT_INLIST       0x02000000  // there is at least one stream blocked by another stream in send_list/fctl_list
 
 /* This function is used to report flags in debugging tools. Please reflect
  * below any single-bit flag addition above in the same order via the