diff --git a/src/Segment.h b/src/Segment.h
index f583b1b..892331c 100644
--- a/src/Segment.h
+++ b/src/Segment.h
@@ -1,5 +1,5 @@
-#ifndef SEGMENT_H
-#define SEGMENT_H
+#ifndef CPPJIEBA_SEGMENT_H
+#define CPPJIEBA_SEGMENT_H
 
 #include <algorithm>
 #include <set>
diff --git a/src/Trie.h b/src/Trie.h
index 0238a5f..2682103 100644
--- a/src/Trie.h
+++ b/src/Trie.h
@@ -1,5 +1,5 @@
-#ifndef TRIE_H
-#define TRIE_H
+#ifndef CPPJIEBA_TRIE_H
+#define CPPJIEBA_TRIE_H
 
 #include <iostream>
 #include <fstream>
diff --git a/src/globals.h b/src/globals.h
index 60b1d96..41f6385 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1,5 +1,5 @@
-#ifndef GLOBALS_H
-#define GLOBALS_H
+#ifndef CPPJIEBA_GLOBALS_H
+#define CPPJIEBA_GLOBALS_H
 
 #include <map>
 #include <vector>