diff --git a/src/header/setjmp/impl/i386/sigsetjmp.s b/src/header/setjmp/impl/i386/sigsetjmp.s
index 0ef1e1b4ec..e1be3b444f 100644
--- a/src/header/setjmp/impl/i386/sigsetjmp.s
+++ b/src/header/setjmp/impl/i386/sigsetjmp.s
@@ -9,7 +9,7 @@ __sigsetjmp:
 
 	mov eax, dword ptr [esp + 4]
 	pop [eax + 24]
-	mov dword ptr [eax * 8 + 28], ebx
+	mov dword ptr [eax + 8 + 28], ebx
 	mov ebx, eax
 
 .hidden ___setjmp
@@ -17,8 +17,8 @@ __sigsetjmp:
 
 	push [ebx + 24]
 	mov dword ptr [esp + 4], ebx
-	mov dword ptr [esp + 4], eax
-	mov ebx, dword ptr [ebx * 8 + 28]
+	mov dword ptr [esp + 8], eax
+	mov ebx, dword ptr [ebx + 8 + 28]
 
 .hidden __sigsetjmp_tail
 	jmp __sigsetjmp_tail
diff --git a/src/header/setjmp/impl/x86_64/sigsetjmp.s b/src/header/setjmp/impl/x86_64/sigsetjmp.s
index ab19b2b2d9..41bd05b518 100644
--- a/src/header/setjmp/impl/x86_64/sigsetjmp.s
+++ b/src/header/setjmp/impl/x86_64/sigsetjmp.s
@@ -8,7 +8,7 @@ __sigsetjmp:
 	jz 1f
 
 	pop [rdi + 64]
-	mov qword ptr [rdi * 8 + 72], rbx
+	mov qword ptr [rdi + 8 + 72], rbx
 	mov rbx, rdi
 
 	call setjmp
@@ -16,7 +16,7 @@ __sigsetjmp:
 	push [rbx + 64]
 	mov rdi, rbx
 	mov esi, eax
-	mov rbx, qword ptr [rbx * 8 + 72]
+	mov rbx, qword ptr [rbx + 8 + 72]
 
 .hidden __sigsetjmp_tail
 	jmp __sigsetjmp_tail