diff --git a/console.asm b/console.asm
index 27649b9..77a16f1 100644
--- a/console.asm
+++ b/console.asm
@@ -27,11 +27,9 @@ puts:
 	push	rbp
 	mov	rbp, rsp
 
-	push	rdi
-	sub	rsp, 8
+	mov	r10, rdi
 	call	print
-	add	rsp, 8
-	pop	rdi
+	mov	rdi, r10
 	mov	rax, 1
 	mov	rdi, 1
 	mov	rsi, NL
diff --git a/string.asm b/string.asm
index aa17097..ce91a5a 100644
--- a/string.asm
+++ b/string.asm
@@ -54,13 +54,11 @@ strcat:
 	push	rbp
 	mov	rbp, rsp
 
-	push	rdi
-	sub	rsp, 8
+	mov	r10, rdi
 	call	strlen
 	add	rdi, rax
 	call	strcpy
-	add	rsp, 8
-	pop	rax
+	mov	rax, r10
 
 	leave
 	ret