diff --git a/js/bootstrap-tooltip.js b/js/bootstrap-tooltip.js
index 241a44e248..8ce30ab82d 100644
--- a/js/bootstrap-tooltip.js
+++ b/js/bootstrap-tooltip.js
@@ -115,7 +115,7 @@
         }
 
         placement = typeof this.options.placement == 'function' ?
-          thing.call(this, $tip[0], this.$element[0]) :
+          this.options.placement.call(this, $tip[0], this.$element[0]) :
           this.options.placement
 
         inside = /in/.test(placement)
@@ -267,4 +267,4 @@
   , template: '<div class="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>'
   }
 
-}( window.jQuery )
\ No newline at end of file
+}( window.jQuery )