diff --git a/cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjectorRegistry.java b/cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjectorRegistry.java
index 55c1ad62..ba6db9d9 100644
--- a/cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjectorRegistry.java
+++ b/cloud-core/src/main/java/cloud/commandframework/annotations/injection/ParameterInjectorRegistry.java
@@ -82,6 +82,12 @@ public final class ParameterInjectorRegistry<C> implements InjectionService<C> {
     /**
      * Register an injector for a particular type predicate.
      *
+     * <p>The predicate should only
+     * return true if the injected type is assignable to the tested type. This predicate overload
+     * is provided in addition to {@link #registerInjector(Class, ParameterInjector)} to allow
+     * for exact, non-exact, or custom predicates, however is still bound by the aforementioned constraint.
+     * Failure to adhere to this will result in runtime exceptions.</p>
+     *
      * @param predicate A predicate that matches if the injector should be used for a type
      * @param injector The injector that should inject the value into the command method
      * @param <T>      Injected type