diff --git a/libafl/src/mutators/mopt_mutator.rs b/libafl/src/mutators/mopt_mutator.rs
index bccedc11a0..19ea88f263 100644
--- a/libafl/src/mutators/mopt_mutator.rs
+++ b/libafl/src/mutators/mopt_mutator.rs
@@ -608,7 +608,7 @@ where
 {
     /// Compute the number of iterations used to apply stacked mutations
     fn iterations(&self, state: &mut S, _: &I) -> u64 {
-        1 << (1 + state.rand_mut().zero_upto(self.max_stack_pow))
+        1 << (1 + state.rand_mut().below_or_zero(self.max_stack_pow))
     }
 
     /// Get the next mutation to apply
diff --git a/libafl/src/mutators/mutations.rs b/libafl/src/mutators/mutations.rs
index f5d624cee8..df407839d9 100644
--- a/libafl/src/mutators/mutations.rs
+++ b/libafl/src/mutators/mutations.rs
@@ -73,7 +73,7 @@ pub fn buffer_set<T: Clone>(data: &mut [T], from: usize, len: usize, val: T) {
 pub fn rand_range<S: HasRand>(state: &mut S, upper: usize, max_len: NonZeroUsize) -> Range<usize> {
     let len = 1 + state.rand_mut().below(max_len);
     // sample from [1..upper + len]
-    let mut offset2 = 1 + state.rand_mut().zero_upto(upper + len - 1);
+    let mut offset2 = 1 + state.rand_mut().below_or_zero(upper + len - 1);
     let offset1 = offset2.saturating_sub(len);
     if offset2 > upper {
         offset2 = upper;
diff --git a/libafl/src/mutators/scheduled.rs b/libafl/src/mutators/scheduled.rs
index b2f64c0932..264a17e8d9 100644
--- a/libafl/src/mutators/scheduled.rs
+++ b/libafl/src/mutators/scheduled.rs
@@ -145,7 +145,7 @@ where
 {
     /// Compute the number of iterations used to apply stacked mutations
     fn iterations(&self, state: &mut S, _: &I) -> u64 {
-        1 << (1 + state.rand_mut().zero_upto(self.max_stack_pow))
+        1 << (1 + state.rand_mut().below_or_zero(self.max_stack_pow))
     }
 
     /// Get the next mutation to apply
diff --git a/libafl/src/mutators/tuneable.rs b/libafl/src/mutators/tuneable.rs
index c03e35e89e..885f5732bc 100644
--- a/libafl/src/mutators/tuneable.rs
+++ b/libafl/src/mutators/tuneable.rs
@@ -132,7 +132,7 @@ where
                 iters
             } else {
                 // fall back to random
-                1 << (1 + state.rand_mut().zero_upto(self.max_stack_pow))
+                1 << (1 + state.rand_mut().below_or_zero(self.max_stack_pow))
             }
         } else {
             // We will sample using the mutation probabilities.
diff --git a/libafl_bolts/src/rands/mod.rs b/libafl_bolts/src/rands/mod.rs
index 739f4a17b1..2490b2a9e5 100644
--- a/libafl_bolts/src/rands/mod.rs
+++ b/libafl_bolts/src/rands/mod.rs
@@ -136,8 +136,8 @@ pub trait Rand: Debug + Serialize + DeserializeOwned {
         fast_bound(self.next(), upper_bound_excl)
     }
 
-    /// Gets a value between [0, n]
-    fn zero_upto(&mut self, n: usize) -> usize {
+    /// Gets a value below the given one or zero
+    fn below_or_zero(&mut self, n: usize) -> usize {
         fast_bound_usize(self.next(), n)
     }