diff --git a/src/libstd/Cargo.toml b/src/libstd/Cargo.toml
index ad5d62f667a..5d797b75621 100644
--- a/src/libstd/Cargo.toml
+++ b/src/libstd/Cargo.toml
@@ -3,7 +3,7 @@ authors = ["The Rust Project Developers"]
 name = "std"
 version = "0.0.0"
 build = "build.rs"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/rust.git"
 description = "The Rust Standard Library"
 edition = "2018"
diff --git a/src/tools/rustbook/Cargo.toml b/src/tools/rustbook/Cargo.toml
index 5bf1553b227..d2b1a7bac60 100644
--- a/src/tools/rustbook/Cargo.toml
+++ b/src/tools/rustbook/Cargo.toml
@@ -2,7 +2,7 @@
 authors = ["The Rust Project Developers"]
 name = "rustbook"
 version = "0.1.0"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [dependencies]
diff --git a/src/tools/rustc-std-workspace-alloc/Cargo.toml b/src/tools/rustc-std-workspace-alloc/Cargo.toml
index 98578914963..05df1fddc7f 100644
--- a/src/tools/rustc-std-workspace-alloc/Cargo.toml
+++ b/src/tools/rustc-std-workspace-alloc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "rustc-std-workspace-alloc"
 version = "1.0.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-license = 'MIT/Apache-2.0'
+license = 'MIT OR Apache-2.0'
 description = """
 Hack for the compiler's own build system
 """
diff --git a/src/tools/rustc-std-workspace-core/Cargo.toml b/src/tools/rustc-std-workspace-core/Cargo.toml
index d527ce12bc3..38ca56a557b 100644
--- a/src/tools/rustc-std-workspace-core/Cargo.toml
+++ b/src/tools/rustc-std-workspace-core/Cargo.toml
@@ -2,7 +2,7 @@
 name = "rustc-std-workspace-core"
 version = "1.0.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-license = 'MIT/Apache-2.0'
+license = 'MIT OR Apache-2.0'
 description = """
 Hack for the compiler's own build system
 """
diff --git a/src/tools/rustc-workspace-hack/Cargo.toml b/src/tools/rustc-workspace-hack/Cargo.toml
index d51841cd650..290c4481c00 100644
--- a/src/tools/rustc-workspace-hack/Cargo.toml
+++ b/src/tools/rustc-workspace-hack/Cargo.toml
@@ -2,7 +2,7 @@
 name = "rustc-workspace-hack"
 version = "1.0.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
-license = 'MIT/Apache-2.0'
+license = 'MIT OR Apache-2.0'
 description = """
 Hack for the compiler's own build system
 """
diff --git a/src/tools/unstable-book-gen/Cargo.toml b/src/tools/unstable-book-gen/Cargo.toml
index 3209de09aeb..e43e4e6c7cb 100644
--- a/src/tools/unstable-book-gen/Cargo.toml
+++ b/src/tools/unstable-book-gen/Cargo.toml
@@ -3,7 +3,7 @@ authors = ["est31 <MTest31@outlook.com>",
            "The Rust Project Developers"]
 name = "unstable-book-gen"
 version = "0.1.0"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [dependencies]