diff --git a/ndn-cpp/c/util/blob.h b/ndn-cpp/c/util/blob.h
index 18bcd03..8d1f784 100644
--- a/ndn-cpp/c/util/blob.h
+++ b/ndn-cpp/c/util/blob.h
@@ -5,11 +5,11 @@
  */
 
 #ifndef NDN_BLOB_H
-#define	NDN_BLOB_H
+#define NDN_BLOB_H
 
 #include <ndn-cpp/c/common.h>
 
-#ifdef	__cplusplus
+#ifdef __cplusplus
 extern "C" {
 #endif
 
@@ -33,7 +33,7 @@
   self->length = length;
 }
 
-#ifdef	__cplusplus
+#ifdef __cplusplus
 }
 #endif