diff --git a/libc-test/semver/linux-musl.txt b/libc-test/semver/linux-musl.txt
index 8497fe9cf529a..b028b51d04d34 100644
--- a/libc-test/semver/linux-musl.txt
+++ b/libc-test/semver/linux-musl.txt
@@ -85,6 +85,8 @@ pututxline
 pwritev2
 pwritev64
 reallocarray
+semid_ds
+seminfo
 setutxent
 tcp_info
 timex
diff --git a/src/unix/linux_like/linux/musl/b32/mod.rs b/src/unix/linux_like/linux/musl/b32/mod.rs
index 00b3d7705090f..18988e1e628e5 100644
--- a/src/unix/linux_like/linux/musl/b32/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/mod.rs
@@ -15,6 +15,22 @@ s! {
         __val: [c_ulong; 32],
     }
 
+    pub struct semid_ds {
+        pub sem_perm: crate::ipc_perm,
+        pub sem_otime: crate::time_t,
+        pub sem_ctime: crate::time_t,
+        #[cfg(target_endian = "little")]
+        pub sem_nsems: crate::c_ushort,
+        #[cfg(target_endian = "little")]
+        __sem_nsems_pad: crate::c_char,
+        #[cfg(target_endian = "big")]
+        __sem_nsems_pad: crate::c_char,
+        #[cfg(target_endian = "big")]
+        pub sem_nsems: crate::c_ushort,
+        __unused3: crate::c_long,
+        __unused4: crate::c_long,
+    }
+
     pub struct msghdr {
         pub msg_name: *mut c_void,
         pub msg_namelen: crate::socklen_t,
diff --git a/src/unix/linux_like/linux/musl/b64/mod.rs b/src/unix/linux_like/linux/musl/b64/mod.rs
index 1bfd812ab2a34..b46772c67be56 100644
--- a/src/unix/linux_like/linux/musl/b64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/mod.rs
@@ -34,6 +34,22 @@ s! {
         __pad2: c_ulong,
     }
 
+    pub struct semid_ds {
+        pub sem_perm: crate::ipc_perm,
+        pub sem_otime: crate::time_t,
+        pub sem_ctime: crate::time_t,
+        #[cfg(target_endian = "little")]
+        pub sem_nsems: crate::c_ushort,
+        #[cfg(target_endian = "little")]
+        __sem_nsems_pad: crate::c_char,
+        #[cfg(target_endian = "big")]
+        __sem_nsems_pad: crate::c_char,
+        #[cfg(target_endian = "big")]
+        pub sem_nsems: crate::c_ushort,
+        __unused3: crate::c_long,
+        __unused4: crate::c_long,
+    }
+
     pub struct msqid_ds {
         pub msg_perm: crate::ipc_perm,
         pub msg_stime: crate::time_t,
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 2d93282b2deca..40f0409e2559f 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -279,6 +279,19 @@ s! {
         pub ch_addralign: crate::Elf32_Word,
     }
 
+    pub struct seminfo {
+        pub semmap: c_int,
+        pub semmni: c_int,
+        pub semmns: c_int,
+        pub semmnu: c_int,
+        pub semmsl: c_int,
+        pub semopm: c_int,
+        pub semume: c_int,
+        pub semusz: c_int,
+        pub semvmx: c_int,
+        pub semaem: c_int,
+    }
+
     pub struct timex {
         pub modes: c_uint,
         pub offset: c_long,