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-rw-r--r--main/utils.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/main/utils.c b/main/utils.c
index 3d3da881c..d117174f6 100644
--- a/main/utils.c
+++ b/main/utils.c
@@ -1265,7 +1265,7 @@ void __ast_string_field_index_build_va(struct ast_string_field_mgr *mgr,
*/
if (fields[index][0] != '0') {
target = (char *) fields[index];
- available = strlen(fields[index]);
+ available = strlen(fields[index]) + 1;
} else {
target = mgr->pool->base + mgr->used;
available = mgr->space;