diff --git a/compiler/rustc_target/src/spec/base/apple/mod.rs b/compiler/rustc_target/src/spec/base/apple/mod.rs
index 460e7e034f3a8..aee5d60626e31 100644
--- a/compiler/rustc_target/src/spec/base/apple/mod.rs
+++ b/compiler/rustc_target/src/spec/base/apple/mod.rs
@@ -55,8 +55,6 @@ impl Arch {
         match self {
             Armv7k | Armv7s | Arm64 | Arm64e | Arm64_32 | I386 | I686 | X86_64 | X86_64h => "",
             X86_64_macabi | Arm64_macabi => "macabi",
-            // x86_64-apple-ios is a simulator target, even though it isn't
-            // declared that way in the target like the other ones...
             I386_sim | Arm64_sim | X86_64_sim => "sim",
         }
     }
diff --git a/compiler/rustc_target/src/spec/targets/i386_apple_ios.rs b/compiler/rustc_target/src/spec/targets/i386_apple_ios.rs
index 63133ff99ea4a..d78acdbd1aad5 100644
--- a/compiler/rustc_target/src/spec/targets/i386_apple_ios.rs
+++ b/compiler/rustc_target/src/spec/targets/i386_apple_ios.rs
@@ -2,6 +2,8 @@ use crate::spec::base::apple::{ios_sim_llvm_target, opts, Arch};
 use crate::spec::{Target, TargetOptions};
 
 pub fn target() -> Target {
+    // i386-apple-ios is a simulator target, even though it isn't declared
+    // that way in the target name like the other ones...
     let arch = Arch::I386_sim;
     Target {
         // Clang automatically chooses a more specific target based on
diff --git a/compiler/rustc_target/src/spec/targets/x86_64_apple_ios.rs b/compiler/rustc_target/src/spec/targets/x86_64_apple_ios.rs
index 55165ea4ec68c..5b34390141e0e 100644
--- a/compiler/rustc_target/src/spec/targets/x86_64_apple_ios.rs
+++ b/compiler/rustc_target/src/spec/targets/x86_64_apple_ios.rs
@@ -2,6 +2,8 @@ use crate::spec::base::apple::{ios_sim_llvm_target, opts, Arch};
 use crate::spec::{SanitizerSet, Target, TargetOptions};
 
 pub fn target() -> Target {
+    // x86_64-apple-ios is a simulator target, even though it isn't declared
+    // that way in the target name like the other ones...
     let arch = Arch::X86_64_sim;
     let mut base = opts("ios", arch);
     base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::THREAD;
diff --git a/compiler/rustc_target/src/spec/targets/x86_64_apple_tvos.rs b/compiler/rustc_target/src/spec/targets/x86_64_apple_tvos.rs
index 20b0161255314..95033699f1af3 100644
--- a/compiler/rustc_target/src/spec/targets/x86_64_apple_tvos.rs
+++ b/compiler/rustc_target/src/spec/targets/x86_64_apple_tvos.rs
@@ -2,6 +2,8 @@ use crate::spec::base::apple::{opts, tvos_sim_llvm_target, Arch};
 use crate::spec::{Target, TargetOptions};
 
 pub fn target() -> Target {
+    // x86_64-apple-tvos is a simulator target, even though it isn't declared
+    // that way in the target name like the other ones...
     let arch = Arch::X86_64_sim;
     Target {
         llvm_target: tvos_sim_llvm_target(arch).into(),