diff --git a/block/io.c b/block/io.c
index e12f303df5..a2fba6738a 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1902,6 +1902,27 @@ void bdrv_aio_cancel_async(BlockAIOCB *acb)
 /**************************************************************/
 /* async block device emulation */
 
+typedef struct BlockRequest {
+    union {
+        /* Used during read, write, trim */
+        struct {
+            int64_t sector;
+            int nb_sectors;
+            int flags;
+            QEMUIOVector *qiov;
+        };
+        /* Used during ioctl */
+        struct {
+            int req;
+            void *buf;
+        };
+    };
+    BlockCompletionFunc *cb;
+    void *opaque;
+
+    int error;
+} BlockRequest;
+
 typedef struct BlockAIOCBCoroutine {
     BlockAIOCB common;
     BlockRequest req;
diff --git a/include/block/block.h b/include/block/block.h
index d6bb74d77e..3fd5043d01 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -320,27 +320,6 @@ BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs,
 void bdrv_aio_cancel(BlockAIOCB *acb);
 void bdrv_aio_cancel_async(BlockAIOCB *acb);
 
-typedef struct BlockRequest {
-    /* Fields to be filled by caller */
-    union {
-        struct {
-            int64_t sector;
-            int nb_sectors;
-            int flags;
-            QEMUIOVector *qiov;
-        };
-        struct {
-            int req;
-            void *buf;
-        };
-    };
-    BlockCompletionFunc *cb;
-    void *opaque;
-
-    /* Filled by block layer */
-    int error;
-} BlockRequest;
-
 /* sg packet commands */
 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
 BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,