diff --git a/src/main/java/org/apache/commons/math3/primes/Primes.java b/src/main/java/org/apache/commons/math3/primes/Primes.java
index 4f27607f3..6e51085f7 100644
--- a/src/main/java/org/apache/commons/math3/primes/Primes.java
+++ b/src/main/java/org/apache/commons/math3/primes/Primes.java
@@ -78,7 +78,7 @@ public class Primes {
         if (n == 2) {
             return 2;
         }
-        n = n | 1;//make sur n is odd
+        n = n | 1;//make sure n is odd
         if (n == 1) {
             return 2;
         }