diff --git a/src/aio/aio.c b/src/aio/aio.c
index fa24f6b6..4c3379e1 100644
--- a/src/aio/aio.c
+++ b/src/aio/aio.c
@@ -401,11 +401,25 @@ void __aio_atfork(int who)
 	if (who<0) {
 		pthread_rwlock_rdlock(&maplock);
 		return;
+	} else if (!who) {
+		pthread_rwlock_unlock(&maplock);
+		return;
 	}
-	if (who>0 && map) for (int a=0; a<(-1U/2+1)>>24; a++)
+	if (pthread_rwlock_tryrdlock(&maplock)) {
+		/* Obtaining lock may fail if _Fork was called nor via
+		 * fork. In this case, no further aio is possible from
+		 * child and we can just null out map so __aio_close
+		 * does not attempt to do anything. */
+		map = 0;
+		return;
+	}
+	if (map) for (int a=0; a<(-1U/2+1)>>24; a++)
 		if (map[a]) for (int b=0; b<256; b++)
 			if (map[a][b]) for (int c=0; c<256; c++)
 				if (map[a][b][c]) for (int d=0; d<256; d++)
 					map[a][b][c][d] = 0;
-	pthread_rwlock_unlock(&maplock);
+	/* Re-initialize the rwlock rather than unlocking since there
+	 * may have been more than one reference on it in the parent.
+	 * We are not a lock holder anyway; the thread in the parent was. */
+	pthread_rwlock_init(&maplock, 0);
 }
diff --git a/src/process/_Fork.c b/src/process/_Fork.c
index da063868..fb0fdc2c 100644
--- a/src/process/_Fork.c
+++ b/src/process/_Fork.c
@@ -14,7 +14,6 @@ pid_t _Fork(void)
 	pid_t ret;
 	sigset_t set;
 	__block_all_sigs(&set);
-	__aio_atfork(-1);
 	LOCK(__abort_lock);
 #ifdef SYS_fork
 	ret = __syscall(SYS_fork);
@@ -32,7 +31,7 @@ pid_t _Fork(void)
 		if (libc.need_locks) libc.need_locks = -1;
 	}
 	UNLOCK(__abort_lock);
-	__aio_atfork(!ret);
+	if (!ret) __aio_atfork(1);
 	__restore_sigs(&set);
 	return __syscall_ret(ret);
 }
diff --git a/src/process/fork.c b/src/process/fork.c
index ff71845c..80e804b1 100644
--- a/src/process/fork.c
+++ b/src/process/fork.c
@@ -36,6 +36,7 @@ static volatile int *const *const atfork_locks[] = {
 static void dummy(int x) { }
 weak_alias(dummy, __fork_handler);
 weak_alias(dummy, __malloc_atfork);
+weak_alias(dummy, __aio_atfork);
 weak_alias(dummy, __ldso_atfork);
 
 static void dummy_0(void) { }
@@ -50,6 +51,7 @@ pid_t fork(void)
 	int need_locks = libc.need_locks > 0;
 	if (need_locks) {
 		__ldso_atfork(-1);
+		__aio_atfork(-1);
 		__inhibit_ptc();
 		for (int i=0; i<sizeof atfork_locks/sizeof *atfork_locks; i++)
 			if (*atfork_locks[i]) LOCK(*atfork_locks[i]);
@@ -75,6 +77,7 @@ pid_t fork(void)
 				if (ret) UNLOCK(*atfork_locks[i]);
 				else **atfork_locks[i] = 0;
 		__release_ptc();
+		if (ret) __aio_atfork(0);
 		__ldso_atfork(!ret);
 	}
 	__restore_sigs(&set);