diff --git a/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala b/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
index 2cdccaa303d2cd38a5c16b9636cc61d416b90c16..36809bb19d2df6c72342f528d9e1d714ff7e79d5 100644
--- a/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
+++ b/public/mapping/src/main/scala/nl/lumc/sasc/biopet/pipelines/mapping/Mapping.scala
@@ -104,7 +104,6 @@ class Mapping(val root: Configurable) extends QScript with BiopetQScript {
     require(sampleId != null, "Missing sample ID on mapping module")
     require(libId != null, "Missing library ID on mapping module")
 
-    if (!outputDir.endsWith("/")) outputDir += "/"
     paired = (input_R2 != null)
 
     if (readgroupId == null && sampleId != null && libId != null) readgroupId = sampleId + "-" + libId