1 files changed, 4 insertions, 0 deletions
diff --git a/phpcpp.h b/phpcpp.h
index 236a93a..9fd97b9 100644
--- a/phpcpp.h
+++ b/phpcpp.h
@@ -7,6 +7,9 @@
  *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
  */
 
+#ifndef PHPCPP_H
+#define PHPCPP_H
+
 /**
  *  Other C and C++ libraries that PhpCpp depends on
  */
@@ -55,3 +58,4 @@
 #   define PHPCPP_EXPORT
 #endif
 
+#endif /* phpcpp.h */