1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index c0efe102d655..af6e9f3de950 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -875,7 +875,7 @@ const char *sym_expand_string_value(const char *in)
                         symval = sym_get_string_value(sym);
                 }
 
-                newlen = strlen(res) + strlen(symval) + strlen(src);
+                newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
                 if (newlen > reslen) {
                         reslen = newlen;
                         res = realloc(res, reslen);