diff --git a/dblayer.php b/dblayer.php
index 50822b8..ed84872 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -635,6 +635,12 @@ class dblayer extends PDO
       $display = array_keys ($this->fields);
     }
 
+    $foreignSelectCols = array ();
+    if ($foreignSelect !== null)
+    {
+      foreach ($foreignSelect as $s)
+        $foreignSelectCols[] = $s[0];
+    }
     $req = "SELECT $this->sep";
     $req .= implode ("$this->sep,$this->sep", $display);
     $req .= "$this->sep ";
@@ -648,6 +654,9 @@ class dblayer extends PDO
       // TODO Allow a field=>value in plus of array("field","value")
       foreach ($select as $n=>$s)
       {
+        // The foreign keys can not be in the select too (conflict)
+        if (in_array ($s[0],$foreignSelectCols))
+          continue;
         if ($n > 0)
         {
           if ($whereOr === false)