diff --git a/ndn-cpp/interest.cpp b/ndn-cpp/interest.cpp
index ceeffcd..92fe972 100644
--- a/ndn-cpp/interest.cpp
+++ b/ndn-cpp/interest.cpp
@@ -52,8 +52,8 @@
 string 
 Exclude::toUri() const
 {
-	if (entries_.size() == 0)
-		return "";
+  if (entries_.size() == 0)
+    return "";
 
   ostringstream result;
   for (unsigned i = 0; i < entries_.size(); ++i) {