diff --git a/quarkus.jdt.ext/com.redhat.microprofile.jdt.quarkus/src/main/java/com/redhat/microprofile/jdt/internal/quarkus/core/properties/QuarkusConfigMappingProvider.java b/quarkus.jdt.ext/com.redhat.microprofile.jdt.quarkus/src/main/java/com/redhat/microprofile/jdt/internal/quarkus/core/properties/QuarkusConfigMappingProvider.java
index 5b0f78e54..d27a5747f 100644
--- a/quarkus.jdt.ext/com.redhat.microprofile.jdt.quarkus/src/main/java/com/redhat/microprofile/jdt/internal/quarkus/core/properties/QuarkusConfigMappingProvider.java
+++ b/quarkus.jdt.ext/com.redhat.microprofile.jdt.quarkus/src/main/java/com/redhat/microprofile/jdt/internal/quarkus/core/properties/QuarkusConfigMappingProvider.java
@@ -211,7 +211,7 @@ private void populateConfigObject(IType configMappingType, String prefixStr, Str
 					JDTQuarkusUtils.updateConverterKinds(metadata, method, enclosedType);
 				} else {
 					// Other type (App, etc)
-					populateConfigObject(returnType, propertyName, extensionName, new HashSet<>(),
+					populateConfigObject(returnType, propertyName, extensionName, typesAlreadyProcessed,
 							configMappingAnnotation, collector, monitor);
 				}
 			}