diff --git a/include/mstch/mstch.hpp b/include/mstch/mstch.hpp
index b5b0d03..fbd25df 100644
--- a/include/mstch/mstch.hpp
+++ b/include/mstch/mstch.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_H_
-#define _MSTCH_H_
+#pragma once
 
 #include <vector>
 #include <map>
@@ -37,5 +36,3 @@ namespace mstch {
             const std::map<std::string,std::string>& partials =
                     std::map<std::string,std::string>());
 }
-
-#endif // _MSTCH_H_
diff --git a/src/render_context.hpp b/src/render_context.hpp
index 9a12253..01ba8ff 100644
--- a/src/render_context.hpp
+++ b/src/render_context.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_RENDER_CONTEXT_H_
-#define _MSTCH_RENDER_CONTEXT_H_
+#pragma once
 
 #include <deque>
 #include <sstream>
@@ -49,5 +48,3 @@ namespace mstch {
         std::string delim_end;
     };
 }
-
-#endif //_MSTCH_RENDER_CONTEXT_H_
diff --git a/src/state/in_inverted_section.hpp b/src/state/in_inverted_section.hpp
index 663f9e0..2a47727 100644
--- a/src/state/in_inverted_section.hpp
+++ b/src/state/in_inverted_section.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_IN_INVERTED_SECTION_H_
-#define _MSTCH_IN_INVERTED_SECTION_H_
+#pragma once
 
 #include <sstream>
 #include "render_state.hpp"
@@ -19,5 +18,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_IN_INVERTED_SECTION_H_
diff --git a/src/state/in_section.hpp b/src/state/in_section.hpp
index f29999b..668285a 100644
--- a/src/state/in_section.hpp
+++ b/src/state/in_section.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_IN_SECTION_H_
-#define _MSTCH_IN_SECTION_H_
+#pragma once
 
 #include "render_state.hpp"
 #include <sstream>
@@ -19,5 +18,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_IN_SECTION_H_
diff --git a/src/state/outside_section.hpp b/src/state/outside_section.hpp
index 9c213ca..bc0d9c0 100644
--- a/src/state/outside_section.hpp
+++ b/src/state/outside_section.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_OUTSIDE_SECTION_H_
-#define _MSTCH_OUTSIDE_SECTION_H_
+#pragma once
 
 #include "render_state.hpp"
 
@@ -12,5 +11,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_OUTSIDE_SECTION_H_
diff --git a/src/state/render_state.hpp b/src/state/render_state.hpp
index 0e1d755..d16280c 100644
--- a/src/state/render_state.hpp
+++ b/src/state/render_state.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_RENDER_STATE_H_
-#define _MSTCH_RENDER_STATE_H_
+#pragma once
 
 #include <memory>
 #include "token.hpp"
@@ -15,5 +14,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_RENDER_STATE_H_
diff --git a/src/token.hpp b/src/token.hpp
index 4a4f572..56a7998 100644
--- a/src/token.hpp
+++ b/src/token.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_TOKEN_H_
-#define _MSTCH_TOKEN_H_
+#pragma once
 
 #include <string>
 
@@ -26,5 +25,3 @@ namespace mstch {
         type token_info(char c);
     };
 }
-
-#endif //_MSTCH_TOKEN_H_
diff --git a/src/utils.hpp b/src/utils.hpp
index 21fd7eb..358d49b 100644
--- a/src/utils.hpp
+++ b/src/utils.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_UTILS_H_
-#define _MSTCH_UTILS_H_
+#pragma once
 
 #include <string>
 
@@ -10,5 +9,3 @@ namespace mstch {
     citer first_not_ws(criter begin, criter end);
     std::string html_escape(std::string str);
 }
-
-#endif //_MSTCH_UTILS_H_
diff --git a/src/visitor/is_node_empty.hpp b/src/visitor/is_node_empty.hpp
index 6ff8c61..75bb4a6 100644
--- a/src/visitor/is_node_empty.hpp
+++ b/src/visitor/is_node_empty.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_IS_NODE_EMPTY_H_
-#define _MSTCH_IS_NODE_EMPTY_H_
+#pragma once
 
 #include <boost/variant/static_visitor.hpp>
 #include <boost/blank.hpp>
@@ -21,5 +20,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_IS_NODE_EMPTY_H_
diff --git a/src/visitor/render_node.hpp b/src/visitor/render_node.hpp
index 57f5b0b..47d7b0f 100644
--- a/src/visitor/render_node.hpp
+++ b/src/visitor/render_node.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_RENDER_NODE_H_
-#define _MSTCH_RENDER_NODE_H_
+#pragma once
 
 #include <boost/variant/static_visitor.hpp>
 #include <boost/blank.hpp>
@@ -26,5 +25,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_RENDER_NODE_H_
diff --git a/src/visitor/render_section.hpp b/src/visitor/render_section.hpp
index 115d083..6f91f9d 100644
--- a/src/visitor/render_section.hpp
+++ b/src/visitor/render_section.hpp
@@ -1,5 +1,4 @@
-#ifndef _MSTCH_RENDER_SECTION_H_
-#define _MSTCH_RENDER_SECTION_H_
+#pragma once
 
 #include <boost/variant/static_visitor.hpp>
 #include <boost/blank.hpp>
@@ -32,5 +31,3 @@ namespace mstch {
         };
     }
 }
-
-#endif //_MSTCH_RENDER_SECTION_H_