diff --git a/partition-before-pggb b/partition-before-pggb
index 53c3c5f..4bad653 100755
--- a/partition-before-pggb
+++ b/partition-before-pggb
@@ -308,7 +308,7 @@ fi
 # Check Pangenome Sequence Naming (PanSN)
 pansn_not_respected=false
 while IFS= read -r line; do
-  if [[ ! $line =~ ^([^#]+#)+[^#]+$ ]] && [[ "$pansn_not_respected" == "false" ]]; then
+  if [[ ! $line =~ ^([^#]+#)[0-9]+#[^#]+$ ]] && [[ "$pansn_not_respected" == "false" ]]; then
     pansn_not_respected=$line
     break
   fi
diff --git a/pggb b/pggb
index 672824c..ba49afe 100755
--- a/pggb
+++ b/pggb
@@ -308,7 +308,7 @@ fi
 # Check Pangenome Sequence Naming (PanSN)
 pansn_not_respected=false
 while IFS= read -r line; do
-  if [[ ! $line =~ ^([^#]+#)+[^#]+$ ]] && [[ "$pansn_not_respected" == "false" ]]; then
+  if [[ ! $line =~ ^([^#]+#)[0-9]+#[^#]+$ ]] && [[ "$pansn_not_respected" == "false" ]]; then
     pansn_not_respected=$line
     break
   fi