diff --git a/bin/sh/alias.c b/bin/sh/alias.c
index 681e82b3e19..7ddc2b30ec3 100644
--- a/bin/sh/alias.c
+++ b/bin/sh/alias.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/alias.h b/bin/sh/alias.h
index d0644b31747..473f31ece68 100644
--- a/bin/sh/alias.h
+++ b/bin/sh/alias.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/arith.h b/bin/sh/arith.h
index 3a7521956c0..1371b02a563 100644
--- a/bin/sh/arith.h
+++ b/bin/sh/arith.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1995
  *      The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/arith_yacc.c b/bin/sh/arith_yacc.c
index cb88cdb4cbe..5c42ce0054e 100644
--- a/bin/sh/arith_yacc.c
+++ b/bin/sh/arith_yacc.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 2007
diff --git a/bin/sh/arith_yacc.h b/bin/sh/arith_yacc.h
index 3203c664a8a..b0e51f19c46 100644
--- a/bin/sh/arith_yacc.h
+++ b/bin/sh/arith_yacc.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 2007
diff --git a/bin/sh/arith_yylex.c b/bin/sh/arith_yylex.c
index 68a641d807a..e6c5f39d4da 100644
--- a/bin/sh/arith_yylex.c
+++ b/bin/sh/arith_yylex.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 2002
  *	Herbert Xu.
  * Copyright (c) 1993
diff --git a/bin/sh/cd.c b/bin/sh/cd.c
index 6f97bff3c9f..c47e39b9205 100644
--- a/bin/sh/cd.c
+++ b/bin/sh/cd.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/cd.h b/bin/sh/cd.h
index e2f8ca54748..6aa04691339 100644
--- a/bin/sh/cd.h
+++ b/bin/sh/cd.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1995
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/error.c b/bin/sh/error.c
index fcc2f309ccb..c634026befb 100644
--- a/bin/sh/error.c
+++ b/bin/sh/error.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/error.h b/bin/sh/error.h
index cb64ec85c09..80c36a7f5f2 100644
--- a/bin/sh/error.h
+++ b/bin/sh/error.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/eval.c b/bin/sh/eval.c
index fdc7a256069..d0fddf16077 100644
--- a/bin/sh/eval.c
+++ b/bin/sh/eval.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/eval.h b/bin/sh/eval.h
index 9a47e9a8db2..aaffcf9af28 100644
--- a/bin/sh/eval.h
+++ b/bin/sh/eval.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/exec.c b/bin/sh/exec.c
index f7788d0758e..42ce5414922 100644
--- a/bin/sh/exec.c
+++ b/bin/sh/exec.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/exec.h b/bin/sh/exec.h
index ff4d5b3c20b..6463a72bb06 100644
--- a/bin/sh/exec.h
+++ b/bin/sh/exec.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/expand.c b/bin/sh/expand.c
index dfafe35fbac..e1e5ac07b7b 100644
--- a/bin/sh/expand.c
+++ b/bin/sh/expand.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 1997-2005
diff --git a/bin/sh/expand.h b/bin/sh/expand.h
index 97203258395..f9fce10cc76 100644
--- a/bin/sh/expand.h
+++ b/bin/sh/expand.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/histedit.c b/bin/sh/histedit.c
index 5aea58650c6..c109cf20613 100644
--- a/bin/sh/histedit.c
+++ b/bin/sh/histedit.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/input.c b/bin/sh/input.c
index 26f233ebf7b..e88d31be12b 100644
--- a/bin/sh/input.c
+++ b/bin/sh/input.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/input.h b/bin/sh/input.h
index 8cf4df1e404..70e6b06c72d 100644
--- a/bin/sh/input.h
+++ b/bin/sh/input.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/jobs.c b/bin/sh/jobs.c
index a4cd7647392..af9dda11a48 100644
--- a/bin/sh/jobs.c
+++ b/bin/sh/jobs.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/jobs.h b/bin/sh/jobs.h
index 149b85d7df8..69562e8c151 100644
--- a/bin/sh/jobs.h
+++ b/bin/sh/jobs.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/bin/sh/mail.c b/bin/sh/mail.c
index be5e76c221f..f4469399eb7 100644
--- a/bin/sh/mail.c
+++ b/bin/sh/mail.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1991, 1993
  *	The Regents of the University of California.  All rights reserved.
  *