diff --git a/src/zeek.bif b/src/zeek.bif
index db0af51ea1..1737349f1b 100644
--- a/src/zeek.bif
+++ b/src/zeek.bif
@@ -2731,7 +2731,7 @@ function raw_bytes_to_v4_addr%(b: string%): addr
 ## .. zeek:see:: raw_bytes_to_v6_addr to_addr to_subnet
 function raw_bytes_to_v6_addr%(x: string%): addr
 	%{
-	uint32_t bytes[4];
+	uint32_t bytes[4] = {0, 0, 0, 0};
 
 	if ( x->Len() < 16 )
 		zeek::emit_builtin_error("too short a string as input to raw_bytes_to_v6_addr()");
diff --git a/testing/btest/Baseline/bifs.raw_bytes_to_v6_addr/out b/testing/btest/Baseline/bifs.raw_bytes_to_v6_addr/out
index 31ab948f9b..059b996fd8 100644
--- a/testing/btest/Baseline/bifs.raw_bytes_to_v6_addr/out
+++ b/testing/btest/Baseline/bifs.raw_bytes_to_v6_addr/out
@@ -1,4 +1,4 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
 4142:4344:4546:4748:494b:4c4d:4e4f:5051
-2852:8180:ff7f:0:2700::
+::
 dada:beef::4e5e:cff:fe6a:8671