diff --git a/DESCRIPTION b/DESCRIPTION
index 0119de9c..e2cd7099 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: AlphaSimR
 Type: Package
 Title: Breeding Program Simulations
-Version: 1.5.2
-Date: 2023-10-31
+Version: 1.5.3
+Date: 2023-11-30
 Authors@R: c(person("Chris", "Gaynor", email = "gaynor.robert@hotmail.com",
   role = c("aut", "cre"), comment = c(ORCID = "0000-0003-0558-6656")),
   person("Gregor", "Gorjanc", role = "ctb", 
diff --git a/NEWS.md b/NEWS.md
index 0ee54e3a..9a73d75a 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# AlphaSimR 1.5.3
+
+*fixed bug in `SimParam$restrSegSites` with excluding sites at end of chromosome
+
 # AlphaSimR 1.5.2
 
 *fix SimParam examples for CRAN
diff --git a/R/Class-SimParam.R b/R/Class-SimParam.R
index e808cbd7..33549cad 100644
--- a/R/Class-SimParam.R
+++ b/R/Class-SimParam.R
@@ -2235,7 +2235,7 @@ SimParam = R6Class(
       cumSumSegSite = cumsum(private$.segSites)
       for(i in take){
         # Identify chromosome
-        chr = findInterval(i, cumSumSegSite) + 1L
+        chr = findInterval(i, cumSumSegSite, left.open = TRUE) + 1L
         
         # Identify position
         if(chr>1L){