diff --git a/src/distributions.rs b/src/distributions.rs
index a948fea..eb20966 100644
--- a/src/distributions.rs
+++ b/src/distributions.rs
@@ -86,7 +86,7 @@ impl DiscreteDistribution {
 
     /// Creates a new Distribution from a given list of proabilities
     pub fn from_list(list: &Vec<Probability>) -> Self {
-        if !is_close(list.into_iter().sum::<Probability>(), 1.0, None)
+        if !is_close(list.into_iter().sum::<Probability>(), 1.0)
             || !list.into_iter().all(|p| 0.0 <= *p && *p <= 1.0)
         {
             return Self {
diff --git a/src/lib.rs b/src/lib.rs
index 05a744e..9dfffe8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -69,8 +69,8 @@ impl FromStr for Algorithm {
 }
 
 /// Are two f64 close enough to be considered the same
-pub fn is_close(a: f64, b: f64, tol: Option<f64>) -> bool {
-    (b - a).abs() < tol.unwrap_or(1e-09)
+pub fn is_close(a: f64, b: f64) -> bool {
+    (b - a).abs() < 1e-09
 }
 
 /// Get Factorial of Number