diff --git a/string.asm b/string.asm
index 8490e1b..fa1400d 100644
--- a/string.asm
+++ b/string.asm
@@ -85,11 +85,11 @@ strcat:
 	push	rbp
 	mov	rbp, rsp
 
-	mov	r10, rdi
+	mov	r8, rdi
 	call	strlen
 	add	rdi, rax
 	call	strcpy
-	mov	rax, r10
+	mov	rax, r8
 
 	leave
 	ret