diff --git a/src/lib/dialog/dialog-content-directives.ts b/src/lib/dialog/dialog-content-directives.ts
index fe5d4042cd1d..edca30a06c2b 100644
--- a/src/lib/dialog/dialog-content-directives.ts
+++ b/src/lib/dialog/dialog-content-directives.ts
@@ -83,8 +83,8 @@ export class MatDialogClose implements OnInit, OnChanges {
       this.dialogResult = proxiedChange.currentValue;
     }
 
-    if (changes.ariaLabel) {
-      this._hasAriaLabel = !!changes.ariaLabel.currentValue;
+    if (changes['ariaLabel']) {
+      this._hasAriaLabel = !!changes['ariaLabel'].currentValue;
     }
   }
 }
diff --git a/src/lib/list/selection-list.ts b/src/lib/list/selection-list.ts
index fc5d3ab97b91..f8bcc8cf9967 100644
--- a/src/lib/list/selection-list.ts
+++ b/src/lib/list/selection-list.ts
@@ -402,8 +402,8 @@ export class MatSelectionList extends _MatSelectionListMixinBase implements Focu
   }
 
   ngOnChanges(changes: SimpleChanges) {
-    const disableRippleChanges = changes.disableRipple;
-    const colorChanges = changes.color;
+    const disableRippleChanges = changes['disableRipple'];
+    const colorChanges = changes['color'];
 
     if ((disableRippleChanges && !disableRippleChanges.firstChange) ||
         (colorChanges && !colorChanges.firstChange)) {