diff --git a/kernel/src/process/wait.rs b/kernel/src/process/wait.rs
index 4e8b6a8a3..8b5b827d3 100644
--- a/kernel/src/process/wait.rs
+++ b/kernel/src/process/wait.rs
@@ -21,6 +21,9 @@ bitflags! {
         const WEXITED = 0x4;
         const WCONTINUED = 0x8;
         const WNOWAIT = 0x01000000;
+        const WNOTHREAD = 0x20000000;
+        const WALL = 0x40000000;
+        const WCLONE = 0x80000000;
     }
 }
 
diff --git a/test/apps/clone3/clone_exit_signal.c b/test/apps/clone3/clone_exit_signal.c
index 5c339f9e4..3ff2f0c64 100644
--- a/test/apps/clone3/clone_exit_signal.c
+++ b/test/apps/clone3/clone_exit_signal.c
@@ -46,7 +46,8 @@ int main(int argc, char *argv[])
 	 * then the parent process must specify the __WALL or __WCLONE
 	 * options when waiting for the child with wait(2).
 	 */
-	waitpid(pid, NULL, __WALL);
+	if (waitpid(pid, NULL, __WALL) < 0)
+		err(EXIT_FAILURE, "cannot wait child process");
 
 	if (child_exit_recv != 1)
 		errx(EXIT_FAILURE, "did not receive exit signal from child");