diff --git a/src/builtin_wait.cpp b/src/builtin_wait.cpp
index 0d60c42a4..e450ffafc 100644
--- a/src/builtin_wait.cpp
+++ b/src/builtin_wait.cpp
@@ -170,10 +170,7 @@ static bool find_job_by_name(const wchar_t *proc, std::vector<job_id_t> &ids,
     return found;
 }
 
-/// The following function is invoked on the main thread, because the job operation is not thread
-/// safe. It waits for child jobs, not for child processes individually.
 maybe_t<int> builtin_wait(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
-    ASSERT_IS_MAIN_THREAD();
     int retval = STATUS_CMD_OK;
     const wchar_t *cmd = argv[0];
     int argc = builtin_count_args(argv);
diff --git a/src/proc.cpp b/src/proc.cpp
index 1c7f4f7f9..49d32b41b 100644
--- a/src/proc.cpp
+++ b/src/proc.cpp
@@ -1070,7 +1070,6 @@ void proc_sanity_check(const parser_t &parser) {
 }
 
 void proc_wait_any(parser_t &parser) {
-    ASSERT_IS_MAIN_THREAD();
     process_mark_finished_children(parser, true /* block_ok */);
     process_clean_after_marking(parser, parser.libdata().is_interactive);
 }