diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c
--- a/sys/compat/freebsd32/freebsd32_misc.c
+++ b/sys/compat/freebsd32/freebsd32_misc.c
@@ -1177,7 +1177,7 @@
 			pscr_args[i] = pscr_args32[i];
 		r.sr.pscr_args = pscr_args;
 		break;
-	case PTLINUX_FIRST ... PTLINUX_LAST:
+	case PTINTERNAL_FIRST ... PTINTERNAL_LAST:
 		error = EINVAL;
 		break;
 	default:
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c
--- a/sys/kern/sys_process.c
+++ b/sys/kern/sys_process.c
@@ -690,7 +690,7 @@
 			break;
 		r.sr.pscr_args = pscr_args;
 		break;
-	case PTLINUX_FIRST ... PTLINUX_LAST:
+	case PTINTERNAL_FIRST ... PTINTERNAL_LAST:
 		error = EINVAL;
 		break;
 	default:
diff --git a/sys/sys/ptrace.h b/sys/sys/ptrace.h
--- a/sys/sys/ptrace.h
+++ b/sys/sys/ptrace.h
@@ -91,10 +91,10 @@
 #include <machine/ptrace.h>	/* machine-specific requests, if any */
 
 #ifdef _KERNEL
-/* Space for Linux ptrace emulation. */
-#define	PTLINUX_FIRST	128
-#define	PTLINUX_LAST	191
-#define	PTLINUX_GET_SC_ARGS	(PTLINUX_FIRST + 0)
+/* Space for ptrace commands not exposed directly to userspace. */
+#define	PTINTERNAL_FIRST	128
+#define	PTINTERNAL_LAST		191
+#define	PTLINUX_GET_SC_ARGS	(PTINTERNAL_FIRST + 0)
 #endif
 
 /* Events used with PT_GET_EVENT_MASK and PT_SET_EVENT_MASK */