diff --git a/include/microkernel/k_struct.h b/include/microkernel/k_struct.h
index 7000b6d6e0e..886fafa5dbd 100644
--- a/include/microkernel/k_struct.h
+++ b/include/microkernel/k_struct.h
@@ -180,12 +180,6 @@ struct k_mrec {
 
 /* target channels types: */
 
-typedef uint32_t REQ_TYPE;
-#define _ALLREQ ((REQ_TYPE)0x0000FF00)
-#define _SYNCREQ ((REQ_TYPE)0x00000100)
-#define _SYNCREQL ((REQ_TYPE)0x00000200)
-#define _ASYNCREQ ((REQ_TYPE)0x00000400)
-
 typedef uint32_t TIME_TYPE;
 #define _ALLTIME ((TIME_TYPE)0x00FF0000)
 #define _TIME_NB ((TIME_TYPE)0x00010000)
diff --git a/kernel/microkernel/channel/ch_addit.c b/kernel/microkernel/channel/ch_addit.c
index 221f9a91774..51717110d59 100644
--- a/kernel/microkernel/channel/ch_addit.c
+++ b/kernel/microkernel/channel/ch_addit.c
@@ -33,6 +33,7 @@
 #include "microkernel/k_struct.h"
 #include "kmemcpy.h"
 #include "minik.h"
+#include "kchan.h"
 #include "kticks.h"
 #include <string_s.h>
 #include <toolchain.h>
diff --git a/kernel/microkernel/include/kchan.h b/kernel/microkernel/include/kchan.h
index f6f1a52ae1d..1ef48c61701 100644
--- a/kernel/microkernel/include/kchan.h
+++ b/kernel/microkernel/include/kchan.h
@@ -39,6 +39,11 @@
 
 #include "ch_cfg.h" /* defines the high-level behavior of the channel service \
 		       */
+typedef uint32_t REQ_TYPE;
+#define _ALLREQ ((REQ_TYPE)0x0000FF00)
+#define _SYNCREQ ((REQ_TYPE)0x00000100)
+#define _SYNCREQL ((REQ_TYPE)0x00000200)
+#define _ASYNCREQ ((REQ_TYPE)0x00000400)
 
 /* K functions: */