diff --git a/bds/source/java/ch/systemsx/cisd/bds/Format.java b/bds/source/java/ch/systemsx/cisd/bds/Format.java
index 5d780694f159fee68290b9746604d35f50005ec3..2c6b91ab4a9114902162cc549a1e95e439bd09ea 100644
--- a/bds/source/java/ch/systemsx/cisd/bds/Format.java
+++ b/bds/source/java/ch/systemsx/cisd/bds/Format.java
@@ -143,7 +143,7 @@ public class Format
     @Override
     public String toString()
     {
-        return "Format: " + code + " " + version + (variant == null ? "" : "[" + variant + "]");
+        return "Format: " + code + " " + version + (variant == null ? "" : " [" + variant + "]");
     }
 
 }