Redundant interpolation prefix

Reports value parameter annotation usages without an explicit target for which the default target might be unexpected and undesirable.

The value parameter annotations without an explicit target are applied only to the parameter itself until Kotlin 2.1.20. For annotations applicable to both parameters and fields or properties, this behavior might be unintended when the annotation is used on a val or var constructor parameter.

Example:

class Example(
    @Param val foo: String,
    @ParamField val bar: String, // the field is not annotated, only the parameter is
    @ParamProperty val baz: String, // the property is not annotated, only the parameter is
    @ParamProperty boo: String,
)

@Target(AnnotationTarget.VALUE_PARAMETER)
annotation class Param
@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.FIELD)
annotation class ParamField
@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.PROPERTY)
annotation class ParamProperty

After the quick-fix is applied:

class Example(
    @Param val foo: String,
    @field:ParamField val bar: String,
    @property:ParamProperty val baz: String,
    @ParamProperty boo: String,
)

@Target(AnnotationTarget.VALUE_PARAMETER)
annotation class Param
@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.FIELD)
annotation class ParamField
@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.PROPERTY)
annotation class ParamProperty

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

AddExplicitTargetToParameterAnnotation

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Probable bugs

Inspection ID: AddExplicitTargetToParameterAnnotation

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection AddExplicitTargetToParameterAnnotation

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025