diff --git a/engines/mysql.inc b/engines/mysql.inc
index 545423c..2053dd8 100644
--- a/engines/mysql.inc
+++ b/engines/mysql.inc
@@ -146,4 +146,49 @@ class SchemaDatabaseSchema_mysql extends DatabaseSchema_mysql {
     return $tables;
   }
 
+  /**
+   * Get parent's type mapping and add missing
+   * 3rd-party module defined types.
+   *
+   * @return
+   *   An array with engine-specific type mappings
+   */
+  public function getFieldTypeMap() {
+    static $map = null;
+
+    if (!$map) {
+      // get our parent class mapping first
+      $map = parent::getFieldTypeMap();
+      $db_type = db_driver() . '_type';
+
+      // Load all table schema fields. This has the effect of
+      //  loading in any 3rd-party module field_schemas
+      $fields = field_read_fields(array(),
+        array('include_deleted' => TRUE, 'include_inactive' => TRUE));
+
+      foreach ($fields as $field) {
+        $cols = $field['columns'];
+
+        // loop thru each column and add any missing mappings
+        foreach ($cols as $name=>$col) {
+          // Schema API says "type" is a required field - bail if it's missing
+          if (!isset($col['type'])) {
+            continue;
+          }
+          $type = $col['type'];
+          $size = (isset($col['size']) ? $col['size'] : 'normal');
+          $generic_type = $type . ':' . $size;
+          if (!isset($map[$generic_type])) {
+            // use engine specific type if it exists
+            $map[$generic_type] = drupal_strtoupper(
+              isset($col[$db_type]) ? $col[$db_type] : $type
+            );
+          }
+        }
+      }
+    }
+
+    return $map;
+  }
+
 }
diff --git a/engines/pgsql.inc b/engines/pgsql.inc
index 4b702b5..c68f2e5 100644
--- a/engines/pgsql.inc
+++ b/engines/pgsql.inc
@@ -240,5 +240,47 @@ class SchemaDatabaseSchema_pgsql extends DatabaseSchema_pgsql {
     return $tables;
   }
 
+  /**
+   * Get parent's type mapping and add missing
+   * 3rd-party module defined types.
+   *
+   * @return
+   *   An array with engine-specific type mappings
+   */
+  public function getFieldTypeMap() {
+    static $map = null;
+
+    if (!$map) {
+      // get our parent class mapping first
+      $map = parent::getFieldTypeMap();
+      $db_type = db_driver() . '_type';
+
+      // Load all table schema fields. This has the effect of
+      //  loading in any 3rd-party module field_schemas
+      $fields = field_read_fields(array(),
+        array('include_deleted' => TRUE, 'include_inactive' => TRUE));
+
+      foreach ($fields as $field) {
+        $cols = $field['columns'];
+
+        // loop thru each column and add any missing mappings
+        foreach ($cols as $name=>$col) {
+          // Schema API says "type" is a required field - bail if it's missing
+          if (!isset($col['type'])) {
+            continue;
+          }
+          $type = $col['type'];
+          $size = (isset($col['size']) ? $col['size'] : 'normal');
+          $generic_type = $type . ':' . $size;
+          if (!isset($map[$generic_type])) {
+            // use engine specific type if it exists
+            $map[$generic_type] = isset($col[$db_type]) ? $col[$db_type] : $type;
+          }
+        }
+      }
+    }
+
+    return $map;
+  }
 
 }