diff --git a/spring-cloud-stream-schema/src/main/java/org/springframework/cloud/stream/schema/avro/QualifiedSubjectNamingStrategy.java b/spring-cloud-stream-schema/src/main/java/org/springframework/cloud/stream/schema/avro/QualifiedSubjectNamingStrategy.java
index 2d103e82b..d068eb6c3 100644
--- a/spring-cloud-stream-schema/src/main/java/org/springframework/cloud/stream/schema/avro/QualifiedSubjectNamingStrategy.java
+++ b/spring-cloud-stream-schema/src/main/java/org/springframework/cloud/stream/schema/avro/QualifiedSubjectNamingStrategy.java
@@ -26,7 +26,7 @@ public class QualifiedSubjectNamingStrategy implements SubjectNamingStrategy {
 
 	@Override
 	public String toSubject(Schema schema) {
-		return schema.getFullName();
+		return schema.getFullName().toLowerCase();
 	}
 
 }