diff --git a/lib/libc_r/uthread/uthread_join.c b/lib/libc_r/uthread/uthread_join.c
index 75ec1f0d64e7..a410a01e1ac1 100644
--- a/lib/libc_r/uthread/uthread_join.c
+++ b/lib/libc_r/uthread/uthread_join.c
@@ -138,6 +138,9 @@ _pthread_join(pthread_t pthread, void **thread_return)
 		ret = curthread->join_status.error;
 		if ((ret == 0) && (thread_return != NULL))
 			*thread_return = curthread->join_status.ret;
+
+		/* Undefer and handle pending signals, yielding if necessary: */
+		_thread_kern_sig_undefer();
 	} else {
 		/*
 		 * The thread exited (is dead) without being detached, and no