diff --git a/sha1_file.c b/sha1_file.c
index 67e815b2db..79ef052b11 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2409,7 +2409,7 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi)
 
 int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
 {
-	struct object_info oi;
+	struct object_info oi = {0};
 
 	oi.sizep = sizep;
 	return sha1_object_info_extended(sha1, &oi);
diff --git a/streaming.c b/streaming.c
index cabcd9d157..cac282f06b 100644
--- a/streaming.c
+++ b/streaming.c
@@ -135,7 +135,7 @@ struct git_istream *open_istream(const unsigned char *sha1,
 				 struct stream_filter *filter)
 {
 	struct git_istream *st;
-	struct object_info oi;
+	struct object_info oi = {0};
 	const unsigned char *real = lookup_replace_object(sha1);
 	enum input_source src = istream_source(real, type, &oi);