diff --git a/wolfcrypt/src/asm.c b/wolfcrypt/src/asm.c
index 0e5d5d4a9..62824672b 100644
--- a/wolfcrypt/src/asm.c
+++ b/wolfcrypt/src/asm.c
@@ -211,6 +211,7 @@ __asm__(                                                  \
         "movq	$0, %%rdx\n\t"                                         \
         "adoxq	%%rdx, %%rax\n\t"                                      \
         "adcxq	%%rdx, %[cy]\n\t"                                      \
+        "adoxq	%%rdx, %[cy]\n\t"                                      \
         "addq   %%rax, %%r15\n\t"                                      \
         "adcq   $0, %[cy]\n\t"                                         \
                                                                        \