diff --git a/lib/std/c.zig b/lib/std/c.zig
index ba982f9f87bfa8c5c3adf9dac934b7274c0748df..11ed75581a330b70b3b0007174a44f379bd45f0b 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -86,9 +86,9 @@ pub const SIOCGIFINDEX = system.SIOCGIFINDEX;
 pub const SO = system.SO;
 pub const SOCK = system.SOCK;
 pub const SOL = system.SOL;
-pub const STDERR_FILENO = system.STDIN_FILENO;
+pub const STDERR_FILENO = system.STDERR_FILENO;
 pub const STDIN_FILENO = system.STDIN_FILENO;
-pub const STDOUT_FILENO = system.STDIN_FILENO;
+pub const STDOUT_FILENO = system.STDOUT_FILENO;
 pub const Sigaction = system.Sigaction;
 pub const Stat = system.Stat;
 pub const W = system.W;
diff --git a/lib/std/c/linux.zig b/lib/std/c/linux.zig
index 56164f55932452b9bc337a874f18fa0f84769abb..0043ca39af102baec46ca49137c67122095952e5 100644
--- a/lib/std/c/linux.zig
+++ b/lib/std/c/linux.zig
@@ -44,9 +44,9 @@ pub const SIOCGIFINDEX = linux.SIOCGIFINDEX;
 pub const SO = linux.SO;
 pub const SOCK = linux.SOCK;
 pub const SOL = linux.SOL;
-pub const STDERR_FILENO = linux.STDIN_FILENO;
+pub const STDERR_FILENO = linux.STDERR_FILENO;
 pub const STDIN_FILENO = linux.STDIN_FILENO;
-pub const STDOUT_FILENO = linux.STDIN_FILENO;
+pub const STDOUT_FILENO = linux.STDOUT_FILENO;
 pub const SYS = linux.SYS;
 pub const Sigaction = linux.Sigaction;
 pub const VDSO = linux.VDSO;
diff --git a/lib/std/os.zig b/lib/std/os.zig
index aa60fc1e24262dc45cfd81091ae179ef316e9b7f..b03adf01700d00eb0d32c627d25cb38774204775 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -104,9 +104,9 @@ pub const SIOCGIFINDEX = system.SIOCGIFINDEX;
 pub const SO = system.SO;
 pub const SOCK = system.SOCK;
 pub const SOL = system.SOL;
-pub const STDERR_FILENO = system.STDIN_FILENO;
+pub const STDERR_FILENO = system.STDERR_FILENO;
 pub const STDIN_FILENO = system.STDIN_FILENO;
-pub const STDOUT_FILENO = system.STDIN_FILENO;
+pub const STDOUT_FILENO = system.STDOUT_FILENO;
 pub const SYS = system.SYS;
 pub const Sigaction = system.Sigaction;
 pub const Stat = system.Stat;