diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index ddfd82625221f..2e6d69c537a41 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -663,6 +663,8 @@ supported_targets! {
     ("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
     ("i686-unknown-linux-musl", i686_unknown_linux_musl),
     ("i586-unknown-linux-musl", i586_unknown_linux_musl),
+    ("i386-unknown-linux-gnu", i386_unknown_linux_gnu),
+    ("i486-unknown-linux-gnu", i486_unknown_linux_gnu),
     ("mips-unknown-linux-musl", mips_unknown_linux_musl),
     ("mipsel-unknown-linux-musl", mipsel_unknown_linux_musl),
     ("mips64-unknown-linux-muslabi64", mips64_unknown_linux_muslabi64),
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index ee17fcac45c36..51a9cf98bb3df 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -177,6 +177,8 @@ target | std | host | notes
 `avr-unknown-gnu-atmega328` | ✗ |  | AVR. Requires `-Z build-std=core`
 `hexagon-unknown-linux-musl` | ? |  |
 `i386-apple-ios` | ✓ |  | 32-bit x86 iOS
+`i386-unknown-linux-gnu` |   |   | 32-bit x86 Linux
+`i486-unknown-linux-gnu` |   |   | 32-bit x86 Linux
 `i686-apple-darwin` | ✓ | ✓ | 32-bit macOS (10.7+, Lion+)
 `i686-pc-windows-msvc` | ✓ |  | 32-bit Windows XP support
 `i686-unknown-uefi` | ? |  | 32-bit UEFI