diff --git a/lib/mixins/property-effects.html b/lib/mixins/property-effects.html
index b33b386b0b..827c6de1a9 100644
--- a/lib/mixins/property-effects.html
+++ b/lib/mixins/property-effects.html
@@ -2797,4 +2797,4 @@
   };
 
 })();
-</script>
\ No newline at end of file
+</script>
diff --git a/lib/mixins/strict-binding-parser.html b/lib/mixins/strict-binding-parser.html
index 5b94efe5b9..4e0c24486f 100644
--- a/lib/mixins/strict-binding-parser.html
+++ b/lib/mixins/strict-binding-parser.html
@@ -280,7 +280,6 @@
                   storeMethodVariable(bindingData, text, i);
                   storeMethod(bindingData, templateInfo);
                   bindingData.startChar = i + 1;
-                  storeMethod(bindingData, templateInfo);
                   state = STATE.METHODCLOSED;
                   break;
                 }
diff --git a/test/unit/property-effects-elements.html b/test/unit/property-effects-elements.html
index 969fe19ce9..2e3efbc0b7 100644
--- a/test/unit/property-effects-elements.html
+++ b/test/unit/property-effects-elements.html
@@ -46,6 +46,7 @@
       compoundAttr2$="literal1 {{cpnd1}} literal2 {{cpnd2}}{{cpnd3.prop}} literal3 {{computeCompound(cpnd4, cpnd5, 'literalComputed')}} literal4"
       compoundAttr3$="[yes/no]: {{cpnd1}}, {{computeCompound('world', 'username ', 'Hello {0} ')}}"
       computed-from-behavior="{{computeFromBehavior(value)}}"
+      computed-dynamic-fn="{{dynamicFn('hello', 'username')}}"
       >
       Test
       <!-- Malformed bindings to be ignored -->
@@ -82,7 +83,7 @@
           content: '[[binding]]'
         }
       </style>
-      <span id="boundWithSlash">[[objectWithSlash.binding/with/slash]]</span> 
+      <span id="boundWithSlash">[[objectWithSlash.binding/with/slash]]</span>
       <span id="jsonContent">[["Jan", 31],["Feb", 28],["Mar", 31]]</span>
       <span id="nonEnglishUnicode">{{objectWithNonEnglishUnicode.商品名}}</span>
       <span id="booleanTrue">foo(field, true): {{computeWithBoolean(otherValue, true)}}</span>
@@ -181,6 +182,9 @@
         },
         title: {
           observer: 'titleChanged'
+        },
+        dynamicFn: {
+          type: Function
         }
       },
       observers: [
@@ -202,6 +206,7 @@
           notifierWithoutComputingChanged: 0
         };
         this.titleChanged = sinon.spy();
+        this._dynamicFnCalled = false;
       },
       ready: function() {
         this.isReady = true;
@@ -328,7 +333,8 @@
         this.customNotifyingValue = 'changed!';
         this.dispatchEvent(new CustomEvent('custom-notifying-value-changed'),
           {value: this.customNotifyingValue});
-      }
+      },
+      dynamicFn: function() {}
     });
 
     HTMLImports.whenReady(() => {
diff --git a/test/unit/property-effects.html b/test/unit/property-effects.html
index f0c78ac772..fbb8ac7fbe 100644
--- a/test/unit/property-effects.html
+++ b/test/unit/property-effects.html
@@ -409,6 +409,13 @@
     }
   });
 
+  test('only calls dynamic functions once', function() {
+    el.dynamicFn = function() {
+      assert.isFalse(this._dynamicFnCalled);
+      this._dynamicFnCalled = true;
+    };
+  });
+
   suite('observer inheritance', function() {
     setup(function() {
       el = document.createElement('sub-observer-element');