diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 2e66d4d0ab097..3b6e15fad4661 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -3253,6 +3253,7 @@ impl ToJson for Target {
         }
 
         target_val!(llvm_target);
+        target_val!(description);
         d.insert("target-pointer-width".to_string(), self.pointer_width.to_string().to_json());
         target_val!(arch);
         target_val!(data_layout);
diff --git a/compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
index 12eba14925807..29c191fc9ab49 100644
--- a/compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
@@ -7,7 +7,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "aarch64-pc-windows-msvc".into(),
-        description: None,
+        description: Some("ARM64 Windows MSVC".into()),
         pointer_width: 64,
         data_layout: "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128".into(),
         arch: "aarch64".into(),
diff --git a/compiler/rustc_target/src/spec/targets/i686_pc_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/i686_pc_windows_msvc.rs
index 28b2345874a0e..0ba486417ff56 100644
--- a/compiler/rustc_target/src/spec/targets/i686_pc_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/i686_pc_windows_msvc.rs
@@ -23,7 +23,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "i686-pc-windows-msvc".into(),
-        description: None,
+        description: Some("32-bit MSVC (Windows 7+)".into()),
         pointer_width: 32,
         data_layout: "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
             i64:64-i128:128-f80:128-n8:16:32-a:0:32-S32"
diff --git a/compiler/rustc_target/src/spec/targets/i686_win7_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/i686_win7_windows_msvc.rs
index 1990c91bdcc33..081b4c5364cf1 100644
--- a/compiler/rustc_target/src/spec/targets/i686_win7_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/i686_win7_windows_msvc.rs
@@ -23,7 +23,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "i686-pc-windows-msvc".into(),
-        description: None,
+        description: Some("32-bit Windows 7 support".into()),
         pointer_width: 32,
         data_layout: "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-\
             i64:64-i128:128-f80:128-n8:16:32-a:0:32-S32"
diff --git a/compiler/rustc_target/src/spec/targets/thumbv7a_pc_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/thumbv7a_pc_windows_msvc.rs
index 31a01f5cbffc0..bb2555bb1a5b1 100644
--- a/compiler/rustc_target/src/spec/targets/thumbv7a_pc_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/thumbv7a_pc_windows_msvc.rs
@@ -13,7 +13,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "thumbv7a-pc-windows-msvc".into(),
-        description: None,
+        description: Some("ARM32 Windows MSVC".into()),
         pointer_width: 32,
         data_layout: "e-m:w-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
         arch: "arm".into(),
diff --git a/compiler/rustc_target/src/spec/targets/x86_64_pc_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/x86_64_pc_windows_msvc.rs
index c8d01a912cb8e..c066c453feb41 100644
--- a/compiler/rustc_target/src/spec/targets/x86_64_pc_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/x86_64_pc_windows_msvc.rs
@@ -10,7 +10,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "x86_64-pc-windows-msvc".into(),
-        description: None,
+        description: Some("64-bit MSVC (Windows 7+)".into()),
         pointer_width: 64,
         data_layout:
             "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
diff --git a/compiler/rustc_target/src/spec/targets/x86_64_win7_windows_msvc.rs b/compiler/rustc_target/src/spec/targets/x86_64_win7_windows_msvc.rs
index f0c1afcdce86f..813802e232043 100644
--- a/compiler/rustc_target/src/spec/targets/x86_64_win7_windows_msvc.rs
+++ b/compiler/rustc_target/src/spec/targets/x86_64_win7_windows_msvc.rs
@@ -9,7 +9,7 @@ pub fn target() -> Target {
 
     Target {
         llvm_target: "x86_64-win7-windows-msvc".into(),
-        description: None,
+        description: Some("64-bit Windows 7 support".into()),
         pointer_width: 64,
         data_layout:
             "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),