diff --git a/common.wdl b/common.wdl
index 2ac9cb99366ab27e768c29a947bf239064193186..d80d47e6d5a964b4ba2637741eeb62b51cecc2f2 100644
--- a/common.wdl
+++ b/common.wdl
@@ -106,7 +106,9 @@ task appendToStringArray {
 }
 
 task createLink {
-    File inputFile
+    # Making this of type File will create a link to the copy of the file in the execution
+    # folder, instead of the actual file.
+    String inputFile
     String outputPath
 
     command {