diff --git a/compiler/rustc_target/src/spec/i686_unknown_freebsd.rs b/compiler/rustc_target/src/spec/i686_unknown_freebsd.rs
index aff284bf2bcf7..ffdf02249bdff 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_freebsd.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_freebsd.rs
@@ -2,7 +2,7 @@ use crate::spec::{LinkerFlavor, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::freebsd_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32", "-Wl,-znotext"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
diff --git a/compiler/rustc_target/src/spec/i686_unknown_haiku.rs b/compiler/rustc_target/src/spec/i686_unknown_haiku.rs
index 87aa74e406c97..b879392781616 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_haiku.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_haiku.rs
@@ -2,7 +2,7 @@ use crate::spec::{LinkerFlavor, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::haiku_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
diff --git a/compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs
index 765803d169280..ec7b99b27d465 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs
@@ -2,7 +2,7 @@ use crate::spec::{LinkerFlavor, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::linux_gnu_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
diff --git a/compiler/rustc_target/src/spec/i686_unknown_linux_musl.rs b/compiler/rustc_target/src/spec/i686_unknown_linux_musl.rs
index d9492804349b3..25e3abcc76716 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_linux_musl.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_linux_musl.rs
@@ -2,7 +2,7 @@ use crate::spec::{FramePointer, LinkerFlavor, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::linux_musl_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32", "-Wl,-melf_i386"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
diff --git a/compiler/rustc_target/src/spec/i686_unknown_netbsd.rs b/compiler/rustc_target/src/spec/i686_unknown_netbsd.rs
index 8de698b51f087..2fb69a09b1dba 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_netbsd.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_netbsd.rs
@@ -2,7 +2,7 @@ use crate::spec::{LinkerFlavor, StackProbeType, Target, TargetOptions};
 
 pub fn target() -> Target {
     let mut base = super::netbsd_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
diff --git a/compiler/rustc_target/src/spec/i686_unknown_openbsd.rs b/compiler/rustc_target/src/spec/i686_unknown_openbsd.rs
index 7f25a1a16c179..0c49a991c28a5 100644
--- a/compiler/rustc_target/src/spec/i686_unknown_openbsd.rs
+++ b/compiler/rustc_target/src/spec/i686_unknown_openbsd.rs
@@ -2,7 +2,7 @@ use crate::spec::{LinkerFlavor, StackProbeType, Target};
 
 pub fn target() -> Target {
     let mut base = super::openbsd_base::opts();
-    base.cpu = "pentium4".into();
+    base.cpu = "pentiumpro".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gcc, &["-m32", "-fuse-ld=lld"]);
     // don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved