| Index: pkg/compiler/lib/src/resolution/members.dart | 
| diff --git a/pkg/compiler/lib/src/resolution/members.dart b/pkg/compiler/lib/src/resolution/members.dart | 
| index efc6e0da4f5c9bd4f9d503a6de9b6a722a586e60..14c1aab6aa0faf0cd28f1e984a8d103f96f416fd 100644 | 
| --- a/pkg/compiler/lib/src/resolution/members.dart | 
| +++ b/pkg/compiler/lib/src/resolution/members.dart | 
| @@ -4061,7 +4061,9 @@ class ResolverVisitor extends MappingVisitor<ResolutionResult> { | 
| DartType type = typeResolver.resolveTypeAnnotation(this, node, | 
| malformedIsError: malformedIsError, | 
| deferredIsMalformed: deferredIsMalformed); | 
| -    registry.registerTypeUse(new TypeUse.checkedModeCheck(type)); | 
| +    if (!type.isDynamic) { | 
| +      registry.registerTypeUse(new TypeUse.checkedModeCheck(type)); | 
| +    } | 
| return type; | 
| } | 
|  | 
|  |