diff --git a/gen.srcml/src/main/java/com/github/gumtreediff/gen/srcml/AbstractSrcmlTreeGenerator.java b/gen.srcml/src/main/java/com/github/gumtreediff/gen/srcml/AbstractSrcmlTreeGenerator.java
index c41e77c6d..ed8989d25 100644
--- a/gen.srcml/src/main/java/com/github/gumtreediff/gen/srcml/AbstractSrcmlTreeGenerator.java
+++ b/gen.srcml/src/main/java/com/github/gumtreediff/gen/srcml/AbstractSrcmlTreeGenerator.java
@@ -171,6 +171,6 @@ public String getXml(Reader r) throws IOException {
     public abstract String getLanguage();
 
     public String[] getArguments(String file) {
-        return new String[]{SRCML_CMD, "-l", getLanguage(), "--position", file};
+        return new String[]{SRCML_CMD, "-l", getLanguage(), "--position", file, "--tabs=1"};
     }
 }