diff --git a/salt/common/tools/sbin/soup b/salt/common/tools/sbin/soup
index e26cf2de7..1695ac0c2 100755
--- a/salt/common/tools/sbin/soup
+++ b/salt/common/tools/sbin/soup
@@ -603,9 +603,13 @@ up_to_2.3.90() {
     if compgen -G "/opt/so/saltstack/local/pillar/minions/*_$i.sls"; then
       echo "Found compgen match for /opt/so/saltstack/local/pillar/minions/*_$i.sls"
       for f in $(compgen -G "/opt/so/saltstack/local/pillar/minions/*_$i.sls"); do
-        echo "Appending soc pillar data to $f"
-        echo "soc:" >> "$f"
-        sed -i "/^soc:/a \\  es_index_patterns: '*:so-*,*:endgame-*'" "$f"
+        if grep -qozP "^soc:\n.*es_index_patterns: '\*:so-\*,\*:endgame-\*'" "$f"; then
+          echo "soc:es_index_patterns already present in $f"
+        else
+          echo "Appending soc pillar data to $f"
+          echo "soc:" >> "$f"
+          sed -i "/^soc:/a \\  es_index_patterns: '*:so-*,*:endgame-*'" "$f"
+        fi
       done
     fi
   done