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-rw-r--r--docs/Changelog.md1
-rw-r--r--src/afl-fuzz-run.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/docs/Changelog.md b/docs/Changelog.md
index e0f8e9bf..60f09ca5 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -19,6 +19,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
       for reporting)
     - if determinstic mode is active (-D, or -M without -d) then we sync
       after every queue entry as this can take very long time otherwise
+    - better detection if a target needs a large shared map
     - switched to a faster RNG
     - added hghwng's patch for faster trace map analysis
   - afl-cc
diff --git a/src/afl-fuzz-run.c b/src/afl-fuzz-run.c
index b597488b..17c305ed 100644
--- a/src/afl-fuzz-run.c
+++ b/src/afl-fuzz-run.c
@@ -424,7 +424,7 @@ u8 calibrate_case(afl_state_t *afl, struct queue_entry *q, u8 *use_mem,
 
   if (unlikely(afl->fixed_seed)) {
 
-    diff_us = (afl->fsrv.exec_tmout - 1) * afl->stage_max;
+    diff_us = (u64)(afl->fsrv.exec_tmout - 1) * (u64)afl->stage_max;
 
   } else {