diff --git a/libc/calls/dup-nt.c b/libc/calls/dup-nt.c
index f093326f3..4d54add88 100644
--- a/libc/calls/dup-nt.c
+++ b/libc/calls/dup-nt.c
@@ -24,9 +24,11 @@
 #include "libc/calls/struct/sigset.internal.h"
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/errno.h"
+#include "libc/intrin/kprintf.h"
 #include "libc/intrin/weaken.h"
 #include "libc/nt/files.h"
 #include "libc/nt/runtime.h"
+#include "libc/runtime/zipos.internal.h"
 #include "libc/sock/internal.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/o.h"
@@ -57,7 +59,11 @@ static textwindows int sys_dup_nt_impl(int oldfd, int newfd, int flags,
       return -1;
     }
     if (g_fds.p[newfd].kind) {
-      sys_close_nt(newfd, newfd);
+      if (g_fds.p[newfd].kind == kFdZip) {
+        _weaken(__zipos_close)(newfd);
+      } else {
+        sys_close_nt(newfd, newfd);
+      }
     }
   }
 
diff --git a/libc/calls/dup2.c b/libc/calls/dup2.c
index e1ddc7488..dbb5064a2 100644
--- a/libc/calls/dup2.c
+++ b/libc/calls/dup2.c
@@ -18,12 +18,15 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/calls/internal.h"
+#include "libc/calls/state.internal.h"
 #include "libc/calls/syscall-nt.internal.h"
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
+#include "libc/runtime/zipos.internal.h"
+#include "libc/str/str.h"
 #include "libc/sysv/errfuns.h"
 
 /**
@@ -74,6 +77,11 @@ int dup2(int oldfd, int newfd) {
 #endif
   } else if (!IsWindows()) {
     rc = sys_dup2(oldfd, newfd, 0);
+    if (rc != -1 && oldfd != newfd && __isfdkind(newfd, kFdZip) && !__vforked) {
+      _weaken(__zipos_free)(
+          (struct ZiposHandle *)(intptr_t)g_fds.p[newfd].handle);
+      bzero(g_fds.p + newfd, sizeof(*g_fds.p));
+    }
   } else if (newfd < 0) {
     rc = ebadf();
   } else if (oldfd == newfd) {
diff --git a/libc/calls/dup3.c b/libc/calls/dup3.c
index eaea8757a..42a0573c9 100644
--- a/libc/calls/dup3.c
+++ b/libc/calls/dup3.c
@@ -18,12 +18,15 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/calls/internal.h"
+#include "libc/calls/state.internal.h"
 #include "libc/calls/syscall-nt.internal.h"
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
+#include "libc/runtime/zipos.internal.h"
+#include "libc/str/str.h"
 #include "libc/sysv/consts/o.h"
 #include "libc/sysv/errfuns.h"
 
@@ -71,6 +74,11 @@ int dup3(int oldfd, int newfd, int flags) {
     rc = enotsup();
   } else if (!IsWindows()) {
     rc = sys_dup3(oldfd, newfd, flags);
+    if (rc != -1 && __isfdkind(newfd, kFdZip) && !__vforked) {
+      _weaken(__zipos_free)(
+          (struct ZiposHandle *)(intptr_t)g_fds.p[newfd].handle);
+      bzero(g_fds.p + newfd, sizeof(*g_fds.p));
+    }
   } else {
     rc = sys_dup_nt(oldfd, newfd, flags, -1);
   }
diff --git a/test/libc/calls/dup_test.c b/test/libc/calls/dup_test.c
index 25556b522..fd3f79e65 100644
--- a/test/libc/calls/dup_test.c
+++ b/test/libc/calls/dup_test.c
@@ -33,6 +33,8 @@
 #include "libc/testlib/testlib.h"
 #include "libc/x/xspawn.h"
 
+__static_yoink("libc/testlib/hyperion.txt");
+
 void SetUpOnce(void) {
   testlib_enable_tmp_setup_teardown();
 }
@@ -50,7 +52,6 @@ static textstartup void TestInit(int argc, char **argv) {
 
 const void *const TestCtor[] initarray = {TestInit};
 
-#if 0
 TEST(dup, ebadf) {
   ASSERT_SYS(EBADF, -1, dup(-1));
   ASSERT_SYS(EBADF, -1, dup2(-1, 0));
@@ -72,7 +73,17 @@ TEST(dup, bigNumber) {
   ASSERT_SYS(0, 100, dup2(0, 100));
   ASSERT_SYS(0, 0, close(100));
 }
-#endif
+
+TEST(dup2, zipos) {
+  ASSERT_SYS(0, 3, creat("real", 0644));
+  ASSERT_SYS(0, 4, open("/zip/libc/testlib/hyperion.txt", O_RDONLY));
+  ASSERT_SYS(0, 2, write(3, "hi", 2));
+  ASSERT_SYS(EBADF, -1, write(4, "hi", 2));
+  ASSERT_SYS(0, 4, dup2(3, 4));
+  ASSERT_SYS(0, 2, write(4, "hi", 2));
+  ASSERT_SYS(0, 0, close(4));
+  ASSERT_SYS(0, 0, close(3));
+}
 
 #ifdef __x86_64__
 TEST(dup, clearsCloexecFlag) {