diff --git a/src/odb.c b/src/odb.c
index cb0f70623..f396149b3 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -1229,7 +1229,7 @@ int git_odb__error_notfound(
 {
 	if (oid != NULL) {
 		char oid_str[GIT_OID_HEXSZ + 1];
-		git_oid_tostr(oid_str, oid_len, oid);
+		git_oid_tostr(oid_str, oid_len+1, oid);
 		giterr_set(GITERR_ODB, "Object not found - %s (%.*s)",
 			message, oid_len, oid_str);
 	} else