diff --git a/include/spdk/dma.h b/include/spdk/dma.h
index 0b3bac3f9..d08500e45 100644
--- a/include/spdk/dma.h
+++ b/include/spdk/dma.h
@@ -66,11 +66,9 @@ struct spdk_memory_domain;
  * Definition of completion callback to be called by fetch function.
  *
  * \param ctx User context passed to fetch function
- * \param iov Pointer to iovs that hold result of fetch function
- * \param iovcnt iov array size
- * \param rc Result of asynchronous fetch function. Data in iov is valid only when rc is 0
+ * \param rc Result of asynchronous fetch function
  */
-typedef void (*spdk_memory_domain_fetch_data_cpl_cb)(void *ctx, void *iov, uint32_t iovcnt, int rc);
+typedef void (*spdk_memory_domain_fetch_data_cpl_cb)(void *ctx, int rc);
 
 /**
  * Definition of function which asynchronously fetches data from src_domain to local memory domain.
diff --git a/test/unit/lib/dma/dma.c/dma_ut.c b/test/unit/lib/dma/dma.c/dma_ut.c
index 7f19beb67..0bd446373 100644
--- a/test/unit/lib/dma/dma.c/dma_ut.c
+++ b/test/unit/lib/dma/dma.c/dma_ut.c
@@ -41,7 +41,7 @@ static bool g_memory_domain_translate_called;
 static int g_memory_domain_cb_rc = 123;
 
 static void
-test_memory_domain_fetch_data_cpl_cb(void *ctx, void *iov, uint32_t iovcnt, int rc)
+test_memory_domain_fetch_data_cpl_cb(void *ctx, int rc)
 {
 }