diff --git a/libc-test/semver/redox.txt b/libc-test/semver/redox.txt
index 6e73d0ac25f7d..5f85e1aa7f3d4 100644
--- a/libc-test/semver/redox.txt
+++ b/libc-test/semver/redox.txt
@@ -180,6 +180,7 @@ bsearch
 chroot
 clearerr
 difftime
+endgrent
 endpwent
 endservent
 epoll_create
@@ -191,7 +192,10 @@ explicit_bzero
 fchdir
 fmemopen
 getdtablesize
+getgrent
+getgrgid
 getgrgid_r
+getgrnam
 getgrnam_r
 getgrouplist
 getline
@@ -212,6 +216,7 @@ pipe2
 pthread_condattr_setclock
 qsort
 reallocarray
+setgrent
 setpwent
 setrlimit
 setservent
diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
index 900337b4f7e21..cd219a777288f 100644
--- a/src/unix/redox/mod.rs
+++ b/src/unix/redox/mod.rs
@@ -1080,6 +1080,10 @@ extern "C" {
     pub fn getdtablesize() -> ::c_int;
 
     // grp.h
+    pub fn getgrent() -> *mut ::group;
+    pub fn setgrent();
+    pub fn endgrent();
+    pub fn getgrgid(gid: ::gid_t) -> *mut ::group;
     pub fn getgrgid_r(
         gid: ::gid_t,
         grp: *mut ::group,
@@ -1087,6 +1091,7 @@ extern "C" {
         buflen: ::size_t,
         result: *mut *mut ::group,
     ) -> ::c_int;
+    pub fn getgrnam(name: *const ::c_char) -> *mut ::group;
     pub fn getgrnam_r(
         name: *const ::c_char,
         grp: *mut ::group,