diff --git a/build_results.py b/build_results.py
index ea1515816c25f9b188cf59b5a04ff0a21ddf6212..5e62a611ffc299a2e5dbb9edab529b0a13bee7f6 100755
--- a/build_results.py
+++ b/build_results.py
@@ -820,8 +820,8 @@ def build_xlsx_cols():
             XLSX_COLS.append(alp + j)
 
 
-def init(output, vcf_folder, true_vcf, filtered_vcf=None, genotypes_file=None, overlap_cutoff=0.5, left_precision=-1,
-         right_precision=-1, no_xls=False, haploid=False):
+def init(output, vcf_folder, true_vcf, filtered_vcf=None, genotypes_file=None, overlap_cutoff=0.5,
+         left_precision=sys.maxsize, right_precision=sys.maxsize, no_xls=False, haploid=False):
     build_xlsx_cols()
 
     genotypes = {}