diff --git a/arch/x86/include/asm/string.h b/arch/x86/include/asm/string.h
index 67d89da6..6ce57543 100644
--- a/arch/x86/include/asm/string.h
+++ b/arch/x86/include/asm/string.h
@@ -66,14 +66,14 @@ inline static void *memset(void *dest, int val, size_t count)
 inline static size_t strlen(const char *str)
 {
 	size_t len = 0;
-	uint32_t i, j = 0;
+	uint32_t i, j;
 
 	if (BUILTIN_EXPECT(!str, 0))
 		return len;
 
 	asm volatile("not %%ecx; cld; repne ; scasb; not %%ecx; dec %%ecx"
 		: "=&c"(len), "=&D"(i), "=&a"(j)
-		: "2"(j), "1"(str), "0"(len)
+		: "2"(0), "1"(str), "0"(len)
 		: "memory");
 
 	return len;