diff --git a/src/shims/posix/foreign_items.rs b/src/shims/posix/foreign_items.rs
index e0ad0d8d411..80611a18e4f 100644
--- a/src/shims/posix/foreign_items.rs
+++ b/src/shims/posix/foreign_items.rs
@@ -133,8 +133,10 @@ fn emulate_foreign_item_by_name(
                     };
                     match res {
                         Ok(n) => i64::try_from(n).unwrap(),
-                        // FIXME: set errno to appropriate value
-                        Err(_) => -1,
+                        Err(e) => {
+                            this.set_last_error_from_io_error(e)?;
+                            -1
+                        }
                     }
                 } else {
                     this.write(fd, buf, count)?