6 files changed, 30 insertions, 0 deletions
diff --git a/src/collect.h b/src/collect.h
index ff43ce0..9f3db63 100644
--- a/src/collect.h
+++ b/src/collect.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_COLLECT_H
+#define LIBSUB_COLLECT_H
+
 #include "subtitle.h"
 #include "raw_subtitle.h"
 
@@ -58,3 +61,5 @@ collect (std::list<RawSubtitle> raw)
 }
 
 }
+
+#endif
diff --git a/src/exceptions.h b/src/exceptions.h
index cb49d86..a0ca1b9 100644
--- a/src/exceptions.h
+++ b/src/exceptions.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_EXCEPTIONS_H
+#define LIBSUB_EXCEPTIONS_H
+
 #include <stdexcept>
 #include <string>
 
@@ -73,3 +76,5 @@ public:
 };
 
 }
+
+#endif
diff --git a/src/stl_binary_reader.h b/src/stl_binary_reader.h
index 9c2e61f..a637e91 100644
--- a/src/stl_binary_reader.h
+++ b/src/stl_binary_reader.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_STL_BINARY_READER_H
+#define LIBSUB_STL_BINARY_READER_H
+
 #include "reader.h"
 #include "stl_binary_tables.h"
 #include <map>
@@ -74,3 +77,5 @@ private:
 };
 
 }
+
+#endif
diff --git a/src/stl_binary_writer.h b/src/stl_binary_writer.h
index 2494d17..b4ab960 100644
--- a/src/stl_binary_writer.h
+++ b/src/stl_binary_writer.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_STL_BINARY_WRITER_H
+#define LIBSUB_STL_BINARY_WRITER_H
+
 #include "stl_binary_tables.h"
 #include <string>
 #include <boost/filesystem.hpp>
@@ -46,3 +49,5 @@ extern void write_stl_binary (
 	);
 
 }
+
+#endif
diff --git a/src/stl_text_reader.h b/src/stl_text_reader.h
index f6eb2a3..77e9b73 100644
--- a/src/stl_text_reader.h
+++ b/src/stl_text_reader.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_STL_TEXT_READER_H
+#define LIBSUB_STL_TEXT_READER_H
+
 #include "reader.h"
 #include <boost/optional.hpp>
 
@@ -39,3 +42,5 @@ private:
 };
 
 }
+
+#endif
diff --git a/src/subrip_reader.h b/src/subrip_reader.h
index 0a43357..9b9ff92 100644
--- a/src/subrip_reader.h
+++ b/src/subrip_reader.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef LIBSUB_SUBRIP_READER_H
+#define LIBSUB_SUBRIP_READER_H
+
 #include "reader.h"
 #include "time_pair.h"
 
@@ -42,3 +45,5 @@ private:
 };
 
 }
+
+#endif