diff --git a/src/runtime/asm_amd64.s b/src/runtime/asm_amd64.s
index 9c262a7ce8..14e2ea6686 100644
--- a/src/runtime/asm_amd64.s
+++ b/src/runtime/asm_amd64.s
@@ -452,6 +452,7 @@ goodm:
 	get_tls(CX)		// Set G in TLS
 	MOVQ	R14, g(CX)
 	MOVQ	(g_sched+gobuf_sp)(R14), SP	// sp = g0.sched.sp
+	MOVQ	$0, BP	// clear frame pointer, as caller may execute on another M
 	PUSHQ	AX	// open up space for fn's arg spill slot
 	MOVQ	0(DX), R12
 	CALL	R12		// fn(g)
diff --git a/src/runtime/asm_arm64.s b/src/runtime/asm_arm64.s
index 6c447ac23c..18d2dc5d57 100644
--- a/src/runtime/asm_arm64.s
+++ b/src/runtime/asm_arm64.s
@@ -233,7 +233,7 @@ TEXT runtime·mcall<ABIInternal>(SB), NOSPLIT|NOFRAME, $0-8
 
 	MOVD	(g_sched+gobuf_sp)(g), R0
 	MOVD	R0, RSP	// sp = m->g0->sched.sp
-	MOVD	(g_sched+gobuf_bp)(g), R29
+	MOVD	$0, R29				// clear frame pointer, as caller may execute on another M
 	MOVD	R3, R0				// arg = g
 	MOVD	$0, -16(RSP)			// dummy LR
 	SUB	$16, RSP