diff --git a/sys/amd64/include/elf.h b/sys/amd64/include/elf.h
index 0a386beafffb..a4c7f79ea3b7 100644
--- a/sys/amd64/include/elf.h
+++ b/sys/amd64/include/elf.h
@@ -81,18 +81,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused for i386). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	AT_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */
diff --git a/sys/arm/include/elf.h b/sys/arm/include/elf.h
index 353be7c533a9..c516864c714f 100644
--- a/sys/arm/include/elf.h
+++ b/sys/arm/include/elf.h
@@ -70,10 +70,6 @@ __ElfType(Auxinfo);
 #define AT_BASE         7       /* Interpreter's base address. */
 #define AT_FLAGS        8       /* Flags (unused). */
 #define AT_ENTRY        9       /* Where interpreter should transfer control. */
-
-#define AT_BRK          10      /* Starting point for sbrk and brk. */
-#define AT_DEBUG        11      /* Debugging level. */
-
 #define AT_NOTELF       10      /* Program is not ELF ?? */
 #define AT_UID          11      /* Real uid. */
 #define AT_EUID         12      /* Effective uid. */
diff --git a/sys/i386/include/elf.h b/sys/i386/include/elf.h
index cf2a2d27daf4..1470173340b1 100644
--- a/sys/i386/include/elf.h
+++ b/sys/i386/include/elf.h
@@ -84,18 +84,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused for i386). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	AT_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */
diff --git a/sys/ia64/include/elf.h b/sys/ia64/include/elf.h
index ec225124b5f0..faab8d15e2da 100644
--- a/sys/ia64/include/elf.h
+++ b/sys/ia64/include/elf.h
@@ -82,18 +82,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused for i386). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	AT_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */
diff --git a/sys/mips/include/elf.h b/sys/mips/include/elf.h
index dadda03330dc..6e48ec13d0f8 100644
--- a/sys/mips/include/elf.h
+++ b/sys/mips/include/elf.h
@@ -241,18 +241,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused for i386). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	AT_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */
diff --git a/sys/powerpc/include/elf.h b/sys/powerpc/include/elf.h
index d2b8e12107d8..422a86a5e992 100644
--- a/sys/powerpc/include/elf.h
+++ b/sys/powerpc/include/elf.h
@@ -80,9 +80,6 @@ __ElfType(Auxinfo);
 
 #define	AT_COUNT	13	/* Count of defined aux entry types. */
 
-/* Used in John Polstra's testbed stuff. */
-#define	AT_DEBUG	14	/* Debugging level. */
-
 /*
  * Relocation types.
  */
diff --git a/sys/sparc64/include/elf.h b/sys/sparc64/include/elf.h
index 76e3a7637199..108ade159e64 100644
--- a/sys/sparc64/include/elf.h
+++ b/sys/sparc64/include/elf.h
@@ -78,18 +78,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	T_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */
diff --git a/sys/sun4v/include/elf.h b/sys/sun4v/include/elf.h
index 76e3a7637199..108ade159e64 100644
--- a/sys/sun4v/include/elf.h
+++ b/sys/sun4v/include/elf.h
@@ -78,18 +78,6 @@ __ElfType(Auxinfo);
 #define	AT_BASE		7	/* Interpreter's base address. */
 #define	AT_FLAGS	8	/* Flags (unused). */
 #define	AT_ENTRY	9	/* Where interpreter should transfer control. */
-
-/*
- * The following non-standard values are used for passing information
- * from John Polstra's testbed program to the dynamic linker.  These
- * are expected to go away soon.
- *
- * Unfortunately, these overlap the Linux non-standard values, so they
- * must not be used in the same context.
- */
-#define	T_BRK		10	/* Starting point for sbrk and brk. */
-#define	AT_DEBUG	11	/* Debugging level. */
-
 /*
  * The following non-standard values are used in Linux ELF binaries.
  */