diff --git a/src/crypto/asn1/a_int.c b/src/crypto/asn1/a_int.c
index 9a56534..46855d9 100644
--- a/src/crypto/asn1/a_int.c
+++ b/src/crypto/asn1/a_int.c
@@ -125,6 +125,8 @@
 		{
 		ret=a->length;
 		i=a->data[0];
+		if (ret == 1 && i == 0)
+			neg=0;
 		if (!neg && (i > 127)) {
 			pad=1;
 			pb=0;
@@ -158,7 +160,7 @@
 		p += a->length - 1;
 		i = a->length;
 		/* Copy zeros to destination as long as source is zero */
-		while(!*n) {
+		while(!*n && i > 1) {
 			*(p--) = 0;
 			n--;
 			i--;