diff --git a/sys/cddl/dev/fbt/aarch64/fbt_isa.c b/sys/cddl/dev/fbt/aarch64/fbt_isa.c
--- a/sys/cddl/dev/fbt/aarch64/fbt_isa.c
+++ b/sys/cddl/dev/fbt/aarch64/fbt_isa.c
@@ -44,6 +44,7 @@
 #define	FBT_PATCHVAL		(AARCH64_BRK | AARCH64_BRK_IMM16_VAL)
 #define	FBT_ENTRY	"entry"
 #define	FBT_RETURN	"return"
+#define	FBT_AFRAMES	4
 
 int
 fbt_invop(uintptr_t addr, struct trapframe *frame, uintptr_t rval)
@@ -141,7 +142,7 @@
 	fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO);
 	fbt->fbtp_name = name;
 	fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
-	    name, FBT_ENTRY, 3, fbt);
+	    name, FBT_ENTRY, FBT_AFRAMES, fbt);
 	fbt->fbtp_patchpoint = instr;
 	fbt->fbtp_ctl = lf;
 	fbt->fbtp_loadcnt = lf->loadcnt;
@@ -183,7 +184,7 @@
 	fbt->fbtp_name = name;
 	if (retfbt == NULL) {
 		fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
-		    name, FBT_RETURN, 3, fbt);
+		    name, FBT_RETURN, FBT_AFRAMES, fbt);
 	} else {
 		retfbt->fbtp_probenext = fbt;
 		fbt->fbtp_id = retfbt->fbtp_id;
diff --git a/sys/cddl/dev/profile/profile.c b/sys/cddl/dev/profile/profile.c
--- a/sys/cddl/dev/profile/profile.c
+++ b/sys/cddl/dev/profile/profile.c
@@ -140,8 +140,7 @@
 #endif
 
 #ifdef __aarch64__
-/* TODO: verify */
-#define	PROF_ARTIFICIAL_FRAMES	10
+#define	PROF_ARTIFICIAL_FRAMES	12
 #endif
 
 #ifdef __riscv