diff --git a/Plan/common/src/main/java/com/djrapitops/plan/extension/ExtensionServiceImplementation.java b/Plan/common/src/main/java/com/djrapitops/plan/extension/ExtensionServiceImplementation.java
index 9563296d3..f19b1dca3 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/extension/ExtensionServiceImplementation.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/extension/ExtensionServiceImplementation.java
@@ -65,6 +65,11 @@ public class ExtensionServiceImplementation implements ExtensionService {
     @Override
     public void register(DataExtension extension) {
         DataProviderExtractor extractor = new DataProviderExtractor(extension);
+
+        for (String warning : extractor.getWarnings()) {
+            logger.warn("DataExtension API implementation mistake for " + extractor.getPluginName() + ": " + warning);
+        }
+
         ProviderValueGatherer gatherer = new ProviderValueGatherer(extension, extractor, dbSystem, serverInfo, logger);
         gatherer.storeExtensionInformation();
         extensionGatherers.put(extractor.getPluginName(), gatherer);
diff --git a/Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/DataProviderExtractor.java b/Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/DataProviderExtractor.java
index 509db2877..89876790c 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/DataProviderExtractor.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/extension/implementation/DataProviderExtractor.java
@@ -141,6 +141,10 @@ public class DataProviderExtractor {
         }
     }
 
+    public Collection<String> getWarnings() {
+        return extensionExtractor.getWarnings();
+    }
+
     /**
      * Functional interface for defining a method that places required DataProvider to DataProviders.
      *