diff --git a/data_structures/queue.h b/data_structures/queue.h
index dd53da7d0..3cb551741 100644
--- a/data_structures/queue.h
+++ b/data_structures/queue.h
@@ -1,6 +1,6 @@
 /* This class specifies the basic operation on a queue as a linked list */
-#ifndef DATA_STRUCTURES_QUEUE_QUEUE_H_
-#define DATA_STRUCTURES_QUEUE_QUEUE_H_
+#ifndef DATA_STRUCTURES_QUEUE_H_
+#define DATA_STRUCTURES_QUEUE_H_
 
 #include <cassert>
 #include <iostream>
@@ -85,4 +85,4 @@ class queue {
     int size;
 };
 
-#endif  // DATA_STRUCTURES_QUEUE_QUEUE_H_
+#endif  // DATA_STRUCTURES_QUEUE_H_
diff --git a/data_structures/stack.h b/data_structures/stack.h
index 8278a3d00..a27d2462b 100644
--- a/data_structures/stack.h
+++ b/data_structures/stack.h
@@ -1,6 +1,6 @@
 /* This class specifies the basic operation on a stack as a linked list */
-#ifndef DATA_STRUCTURES_STK_STACK_H_
-#define DATA_STRUCTURES_STK_STACK_H_
+#ifndef DATA_STRUCTURES_STACK_H_
+#define DATA_STRUCTURES_STACK_H_
 
 #include <cassert>
 #include <iostream>
@@ -108,4 +108,4 @@ class stack {
     int size;
 };
 
-#endif  // DATA_STRUCTURES_STK_STACK_H_
+#endif  // DATA_STRUCTURES_STACK_H_