diff --git a/Makefile b/Makefile
index 9007e4632dd6312d9dcef8effd9101217326df5c..fcb0add063bed989c2f3330e970278051617360e 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ CLASSPATH:=$(shell find ${ROSETTASDK} -name "*.jar" -print | xargs echo | sed -e
 PLUGINCLASS:=SLUBRetroMonographieTIFFFormatValidationPlugin
 SOURCES:=java/org/slub/rosetta/dps/repository/plugin/${PLUGINCLASS}.java
 OBJS:=$(SOURCES:.java=.class)
-PLUGINVERSION:=$(shell grep -o "<version>.*</version>" PLUGIN-INF/*.xml | sed -e "s#<version>##g" | sed -e "s#</version>##g")
+PLUGINVERSION:=$(shell grep -o "<pl:version>.*</pl:version>" PLUGIN-INF/*.xml | sed -e "s#<pl:version>##g" | sed -e "s#</pl:version>##g")
 JAR:=${PLUGINCLASS}-${PLUGINVERSION}_sdk-${ROSETTAVERSION}.jar
 BUILD:=build/