diff --git a/crypto/bn/asm/x86_64-gcc.c b/crypto/bn/asm/x86_64-gcc.c
index b97b394661aa2bf627c43c7ba77899f33653a05c..450e8e43228e11307d7dc2608b5f473f1db1371e 100644
--- a/crypto/bn/asm/x86_64-gcc.c
+++ b/crypto/bn/asm/x86_64-gcc.c
@@ -142,7 +142,7 @@ void bn_sqr_words(BN_ULONG *r, BN_ULONG *a, int n)
 BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
 {	BN_ULONG ret,waste;
 
-	asm ("divq	%3"
+	asm ("divq	%4"
 		: "=a"(ret),"=d"(waste)
 		: "a"(l),"d"(h),"g"(d)
 		: "cc");