diff --git a/libraries/libvapours/source/crypto/crypto_memory_compare.arch.arm64.cpp b/libraries/libvapours/source/crypto/crypto_memory_compare.arch.arm64.cpp
index 54b4e9a1b..2532415d4 100644
--- a/libraries/libvapours/source/crypto/crypto_memory_compare.arch.arm64.cpp
+++ b/libraries/libvapours/source/crypto/crypto_memory_compare.arch.arm64.cpp
@@ -47,8 +47,8 @@ namespace ams::crypto {
             "   cmp     %w[xor_acc], #0\n"
             "   cset    %w[result], eq\n"
             : [result]"=r"(result), [lhs]"+r"(lhs), [rhs]"+r"(rhs), [xor_acc]"=&r"(xor_acc), [index]"=&r"(index), [ltmp]"=&r"(ltmp), [rtmp]"=&r"(rtmp)
-            : [size]"r"(size)
-            : "cc"
+            : "m"(*(const u8 (*)[size])lhs), "m"(*(const u8 (*)[size])lhs), [size]"r"(size)
+            :  "cc"
         );
 
         return result;