1 files changed, 5 insertions, 3 deletions

diff --git a/src/regex.c b/src/regex.c
index 49ec073b892..6c79ba85035 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -1217,9 +1217,11 @@ typedef struct
                                                                         \
       (fail_stack).stack == NULL                                        \
       ? 0                                                               \
-      : (MIN (re_max_failures * TYPICAL_FAILURE_SIZE,                   \
-              ((fail_stack).size * sizeof (fail_stack_elt_t)            \
-               * FAIL_STACK_GROWTH_FACTOR)),                            \
+      : ((fail_stack).size                                              \
+         = (MIN (re_max_failures * TYPICAL_FAILURE_SIZE,                \
+                 ((fail_stack).size * sizeof (fail_stack_elt_t)         \
+                  * FAIL_STACK_GROWTH_FACTOR))                          \
+            / sizeof (fail_stack_elt_t)),                               \
          1)))