diff --git a/Makefile b/Makefile
index c498fc078664a488ae6440275640e54be249ff32..9458624ee431865f1ffaf88741d1ec2cc07f8a27 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ CLASSPATH:=${ROSETTASDKDEPOSIT}/dps-sdk-${ROSETTAVERSION}.jar:${LOCALJARS}
 #BUILDPATH=$(CLASSPATH)
 
 # sources
-SOURCES:=java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java java/org/slub/rosetta/dps/repository/plugin/TestSLUBXmlFormatValidationPlugin.java
+SOURCES:=$(shell find java/ -name "*.java" -print | xargs echo )
 OBJS:=$(SOURCES:.java=.class)
 BUILD:=build/