diff --git a/Cargo.toml b/Cargo.toml
index 0e488c4d..638f780d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -69,7 +69,7 @@ libc = { version = "0.2.154", default-features = false }
 libc = { version = "0.2.154", default-features = false }
 
 # use_file
-[target.'cfg(any(target_os = "haiku", target_os = "redox", target_os = "nto", target_os = "aix"))'.dependencies]
+[target.'cfg(any(target_os = "haiku", target_os = "redox", target_os = "nto", target_os = "aix", target_os = "zos"))'.dependencies]
 libc = { version = "0.2.154", default-features = false }
 
 # vxworks
diff --git a/src/backends.rs b/src/backends.rs
index 86ffd757..33aead4a 100644
--- a/src/backends.rs
+++ b/src/backends.rs
@@ -46,6 +46,7 @@ cfg_if! {
         target_os = "redox",
         target_os = "nto",
         target_os = "aix",
+        target_os = "zos",
     ))] {
         mod use_file;
         pub use use_file::*;
diff --git a/src/utils/get_errno.rs b/src/utils/get_errno.rs
index 1895fc05..ceff150c 100644
--- a/src/utils/get_errno.rs
+++ b/src/utils/get_errno.rs
@@ -1,5 +1,5 @@
 cfg_if! {
-    if #[cfg(any(target_os = "netbsd", target_os = "openbsd", target_os = "android", target_os = "cygwin"))] {
+    if #[cfg(any(target_os = "netbsd", target_os = "openbsd", target_os = "android", target_os = "cygwin", target_os = "zos"))] {
         use libc::__errno as errno_location;
     } else if #[cfg(any(target_os = "linux", target_os = "emscripten", target_os = "hurd", target_os = "redox", target_os = "dragonfly"))] {
         use libc::__errno_location as errno_location;