diff --git a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/MergeBase.java b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/MergeBase.java
index 22d33582f..60b174376 100644
--- a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/MergeBase.java
+++ b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/MergeBase.java
@@ -70,14 +70,16 @@ class MergeBase extends TextBuiltin {
 	@Override
 	protected void run() {
 		try {
-			for (RevCommit c : commits)
+			for (RevCommit c : commits) {
 				argWalk.markStart(c);
+			}
 			argWalk.setRevFilter(RevFilter.MERGE_BASE);
 			int max = all ? Integer.MAX_VALUE : 1;
 			while (max-- > 0) {
 				final RevCommit b = argWalk.next();
-				if (b == null)
+				if (b == null) {
 					break;
+				}
 				outw.println(b.getId().name());
 			}
 		} catch (IOException e) {