diff --git a/libc/proc/posix_spawn.c b/libc/proc/posix_spawn.c
index 434702d77..c3eaac6a9 100644
--- a/libc/proc/posix_spawn.c
+++ b/libc/proc/posix_spawn.c
@@ -350,12 +350,8 @@ static textwindows errno_t posix_spawn_nt_impl(
   // figure out flags
   uint32_t dwCreationFlags = 0;
   short flags = attrp && *attrp ? (*attrp)->flags : 0;
-  if (flags & POSIX_SPAWN_SETSID) {
-    dwCreationFlags |= kNtDetachedProcess;
-  }
-  if (flags & POSIX_SPAWN_SETPGROUP) {
+  if (flags & POSIX_SPAWN_SETPGROUP)
     dwCreationFlags |= kNtCreateNewProcessGroup;
-  }
 
   // create process startinfo
   struct NtStartupInfo startinfo = {