diff --git location.ca.inc location.ca.inc
index 0686424..4bcf317 100644
--- location.ca.inc
+++ location.ca.inc
@@ -60,15 +60,15 @@ function location_latlon_rough_ca($location = array()) {
   if (!isset($location['postal_code'])) {
     return NULL;
   }
-
-  $result = db_query("SELECT latitude, longitude FROM {zipcodes} WHERE country = '%s' AND zip = '%s'", $location['country'], $location['postal_code']);
-
-  if ($row = db_fetch_object($result)) {
-    return array('lat' => $row->latitude, 'lon' => $row->longitude);
-  }
-  else {
-    return NULL;
+  $postal_code = $location['postal_code'];
+  while(strlen($postal_code) >= 3) {
+    $result = db_query("SELECT latitude, longitude FROM {zipcodes} WHERE country = '%s' AND zip LIKE '%s%'", $location['country'], $postal_code);
+    if ($row = db_fetch_object($result)) {
+      return array('lat' => $row->latitude, 'lon' => $row->longitude);
+    }
+    $postal_code = trim(substr($postal_code, 0, -1));
   }
+  return NULL;
 }
 
 /**