--- syntax/Syntax
+++ syntax/Syntax
@@ -72,7 +72,7 @@
 file ..\*\.(texi|texinfo|TEXI|TEXINFO)$ Texinfo\sDocument
 include texinfo.syntax
 
-file ..\*\\.([chC]|CC|cxx|cc|cpp|CPP|CXX|hxx|h\.in)$ C/C\+\+\sProgram
+file ..\*\\.([chC]|CC|cxx|cc|cpp|CPP|CXX|hxx|hpp|HPP|h\.in)$ C/C\+\+\sProgram
 include c.syntax
 
 file ..\*\\.[fF]$ Fortran\sProgram