diff --git a/lib/rules/display-name.js b/lib/rules/display-name.js
index 96a007460f..cacd75f8b6 100644
--- a/lib/rules/display-name.js
+++ b/lib/rules/display-name.js
@@ -158,6 +158,10 @@ module.exports = function(context) {
     ObjectExpression: function(node) {
       // Search for the displayName declaration
       node.properties.forEach(function(property) {
+        if (!property.key) {
+          return;
+        }
+
         if (!isDisplayNameDeclaration(property.key)) {
           return;
         }
diff --git a/lib/rules/jsx-sort-prop-types.js b/lib/rules/jsx-sort-prop-types.js
index 6db316d3db..7e832d1db3 100644
--- a/lib/rules/jsx-sort-prop-types.js
+++ b/lib/rules/jsx-sort-prop-types.js
@@ -81,6 +81,10 @@ module.exports = function(context) {
 
     ObjectExpression: function(node) {
       node.properties.forEach(function(property) {
+        if (!property.key) {
+          return;
+        }
+
         if (!isPropTypesDeclaration(property.key)) {
           return;
         }