diff --git a/lib/isc/inet_ntop.c b/lib/isc/inet_ntop.c
index 21d5f4b7de..eeb236c5e7 100644
--- a/lib/isc/inet_ntop.c
+++ b/lib/isc/inet_ntop.c
@@ -126,7 +126,9 @@ inet_ntop6(const unsigned char *src, char *dst, size_t size)
 	for (i = 0; i < NS_IN6ADDRSZ; i++)
 		words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
 	best.base = -1;
+	best.len = 0;	/* silence compiler */
 	cur.base = -1;
+	cur.len = 0;	/* silence compiler */
 	for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++) {
 		if (words[i] == 0) {
 			if (cur.base == -1)