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-rw-r--r--src/afl-fuzz-mutators.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/afl-fuzz-mutators.c b/src/afl-fuzz-mutators.c
index 850266c2..b288cf9f 100644
--- a/src/afl-fuzz-mutators.c
+++ b/src/afl-fuzz-mutators.c
@@ -40,7 +40,7 @@ void setup_custom_mutators(afl_state_t *afl) {
 
   if (fn) {
 
-    if (afl->limit_time_sig)
+    if (afl->limit_time_sig && afl->limit_time_sig != -1)
       FATAL(
           "MOpt and custom mutator are mutually exclusive. We accept pull "
           "requests that integrates MOpt with the optional mutators "