diff --git a/modules/juce_audio_processors/processors/juce_AudioProcessor.cpp b/modules/juce_audio_processors/processors/juce_AudioProcessor.cpp
index aa4c198e97..fe1c7fd1c2 100644
--- a/modules/juce_audio_processors/processors/juce_AudioProcessor.cpp
+++ b/modules/juce_audio_processors/processors/juce_AudioProcessor.cpp
@@ -310,6 +310,10 @@ void AudioProcessor::addParameter (AudioProcessorParameter* p)
     p->processor = this;
     p->parameterIndex = managedParameters.size();
     managedParameters.add (p);
+
+    // if you're using parameter objects, then you must not override the
+    // deprecated getNumParameters() method!
+    jassert (getNumParameters() == AudioProcessor::getNumParameters());
 }
 
 void AudioProcessor::suspendProcessing (const bool shouldBeSuspended)