diff --git a/src/engine/cache_engine.c b/src/engine/cache_engine.c
index c2465a9..6881b4c 100644
--- a/src/engine/cache_engine.c
+++ b/src/engine/cache_engine.c
@@ -138,7 +138,7 @@ const char *ocf_get_io_iface_name(ocf_req_cache_mode_t cache_mode)
 	return cache_mode_io_if_map[cache_mode]->name;
 }
 
-static ocf_engine_cb ocf_io_if_type_to_engine_cb(
+static ocf_req_cb ocf_io_if_type_to_engine_cb(
 		enum ocf_io_if_type io_if_type, int rw)
 {
 	if (unlikely(io_if_type == OCF_IO_MAX_IF ||
@@ -149,7 +149,7 @@ static ocf_engine_cb ocf_io_if_type_to_engine_cb(
 	return IO_IFS[io_if_type].cbs[rw];
 }
 
-static ocf_engine_cb ocf_cache_mode_to_engine_cb(
+static ocf_req_cb ocf_cache_mode_to_engine_cb(
 		ocf_req_cache_mode_t req_cache_mode, int rw)
 {
 	if (req_cache_mode == ocf_req_cache_mode_max)
@@ -271,7 +271,7 @@ int ocf_engine_hndl_req(struct ocf_request *req)
 
 int ocf_engine_hndl_fast_req(struct ocf_request *req)
 {
-	ocf_engine_cb engine_cb;
+	ocf_req_cb engine_cb;
 	int ret;
 
 	engine_cb = ocf_cache_mode_to_engine_cb(req->cache_mode, req->rw);
diff --git a/src/engine/cache_engine.h b/src/engine/cache_engine.h
index 6e211de..88c6da4 100644
--- a/src/engine/cache_engine.h
+++ b/src/engine/cache_engine.h
@@ -7,42 +7,22 @@
 #ifndef __CACHE_ENGINE_H_
 #define __CACHE_ENGINE_H_
 
+#include "../ocf_request.h"
+
 struct ocf_thread_priv;
-struct ocf_request;
 
 #define LOOKUP_HIT 5
 #define LOOKUP_MISS 6
 #define LOOKUP_REMAPPED 8
 
-typedef enum {
-	/* modes inherited from user API */
-	ocf_req_cache_mode_wt = ocf_cache_mode_wt,
-	ocf_req_cache_mode_wb = ocf_cache_mode_wb,
-	ocf_req_cache_mode_wa = ocf_cache_mode_wa,
-	ocf_req_cache_mode_pt = ocf_cache_mode_pt,
-	ocf_req_cache_mode_wi = ocf_cache_mode_wi,
-	ocf_req_cache_mode_wo = ocf_cache_mode_wo,
-
-	/* internal modes */
-	ocf_req_cache_mode_fast,
-		/*!< Fast path */
-	ocf_req_cache_mode_d2c,
-		/*!< Direct to Core - pass through to core without
-				touching cacheline metadata */
-
-	ocf_req_cache_mode_max,
-} ocf_req_cache_mode_t;
-
 static inline ocf_req_cache_mode_t ocf_cache_mode_to_req_cache_mode(
 		ocf_cache_mode_t mode)
 {
 	return (ocf_req_cache_mode_t)mode;
 }
 
-typedef int (*ocf_engine_cb)(struct ocf_request *req);
-
 struct ocf_io_if {
-	ocf_engine_cb cbs[2]; /* READ and WRITE */
+	ocf_req_cb cbs[2]; /* READ and WRITE */
 
 	const char *name;
 };
diff --git a/src/engine/engine_common.c b/src/engine/engine_common.c
index 24643f6..fab760c 100644
--- a/src/engine/engine_common.c
+++ b/src/engine/engine_common.c
@@ -1,6 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
- * Copyright(c) 2024 Huawei Technologies Co., Ltd.
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -645,11 +645,11 @@ void ocf_engine_push_req_front(struct ocf_request *req, bool allow_sync)
 }
 
 void ocf_engine_push_req_front_cb(struct ocf_request *req,
-		ocf_engine_cb engine_cb,
+		ocf_req_cb req_cb,
 		bool allow_sync)
 {
 	req->error = 0; /* Please explain why!!! */
-	req->engine_handler = engine_cb;
+	req->engine_handler = req_cb;
 	ocf_engine_push_req_front(req, allow_sync);
 }
 
diff --git a/src/engine/engine_common.h b/src/engine/engine_common.h
index 6f9c73f..fa30f2a 100644
--- a/src/engine/engine_common.h
+++ b/src/engine/engine_common.h
@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -309,7 +310,7 @@ void ocf_engine_push_req_front(struct ocf_request *req,
 		from push function in caller context
  */
 void ocf_engine_push_req_front_cb(struct ocf_request *req,
-		ocf_engine_cb engine_cb,
+		ocf_req_cb req_cb,
 		bool allow_sync);
 
 void inc_fallback_pt_error_counter(ocf_cache_t cache);
diff --git a/src/ocf_request.h b/src/ocf_request.h
index 5e05139..5357176 100644
--- a/src/ocf_request.h
+++ b/src/ocf_request.h
@@ -9,9 +9,27 @@
 
 #include "ocf_env.h"
 #include "ocf_io_priv.h"
-#include "engine/cache_engine.h"
 #include "metadata/metadata_structs.h"
 
+typedef enum {
+	/* modes inherited from user API */
+	ocf_req_cache_mode_wt = ocf_cache_mode_wt,
+	ocf_req_cache_mode_wb = ocf_cache_mode_wb,
+	ocf_req_cache_mode_wa = ocf_cache_mode_wa,
+	ocf_req_cache_mode_pt = ocf_cache_mode_pt,
+	ocf_req_cache_mode_wi = ocf_cache_mode_wi,
+	ocf_req_cache_mode_wo = ocf_cache_mode_wo,
+
+	/* internal modes */
+	ocf_req_cache_mode_fast,
+		/*!< Fast path */
+	ocf_req_cache_mode_d2c,
+		/*!< Direct to Core - pass through to core without
+				touching cacheline metadata */
+
+	ocf_req_cache_mode_max,
+} ocf_req_cache_mode_t;
+
 struct ocf_req_allocator;
 
 struct ocf_req_info {
@@ -94,6 +112,12 @@ struct ocf_req_discard_info {
 		/*!< Number of processed sector during discard operation */
 };
 
+/**
+ * @brief OCF IO engine handler callback
+ */
+struct ocf_request;
+typedef int (*ocf_req_cb)(struct ocf_request *req);
+
 /**
  * @brief OCF IO request
  */
@@ -129,7 +153,7 @@ struct ocf_request {
 	ocf_core_t core;
 	/*!< Handle to core instance */
 
-	ocf_engine_cb engine_handler;
+	ocf_req_cb engine_handler;
 	/*!< IO engine handler */
 
 	void *priv;