diff --git a/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/BiopetExecutable.scala b/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/BiopetExecutable.scala
index 32cfbf1fc3ccc3a4e6ae572fe25dc29e8bbe4918..0acc5f348c65a878926d64e3482008ff037505f8 100644
--- a/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/BiopetExecutable.scala
+++ b/biopet-framework/src/main/scala/nl/lumc/sasc/biopet/core/BiopetExecutable.scala
@@ -115,7 +115,10 @@ object BiopetExecutable extends Logging {
     prop.load(getClass.getClassLoader.getResourceAsStream("git.properties"))
     val describeShort = prop.getProperty("git.commit.id.describe-short")
     if (describeShort.endsWith("-dirty")) {
-      logger.warn("This is a dirty build")
+      logger.warn("**********************************************************")
+      logger.warn("* This JAR was built while there are uncommited changes. *")
+      logger.warn("* Reproducible results are *not* guaranteed.             *")
+      logger.warn("**********************************************************")
     }
   }
   checkDirtyBuild(logger)