diff --git a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
index 82f94b9..e65e987 100644
--- a/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
+++ b/pregelix/pregelix-core/src/main/java/edu/uci/ics/pregelix/core/driver/Driver.java
@@ -146,7 +146,7 @@
             } while (failed && retryCount < maxRetryCount);
             LOG.info("job finished");
         } catch (Exception e) {
-	    e.printStackTrace();
+            e.printStackTrace();
             throw new HyracksException(e);
         }
     }