diff --git a/block-raw-posix.c b/block-raw-posix.c
index 2fbb714d01ba278e92344810fc349d80271acd65..d17af0b34e23f3d3899addce2e5c0afdf3fdf74f 100644
--- a/block-raw-posix.c
+++ b/block-raw-posix.c
@@ -252,7 +252,7 @@ static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 
     ret = fd_open(bs);
     if (ret < 0)
-        return ret;
+        return -errno;
 
     if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) {
         ++(s->lseek_err_cnt);
@@ -262,7 +262,7 @@ static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
                               s->fd, bs->filename, offset, buf, count,
                               bs->total_sectors, errno, strerror(errno));
         }
-        return -1;
+        return -EIO;
     }
     s->lseek_err_cnt = 0;
 
@@ -277,7 +277,7 @@ static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset,
 
 label__raw_write__success:
 
-    return ret;
+    return  (ret < 0) ? -errno : ret;
 }