diff --git a/flawfinder b/flawfinder
index cee78ee..b3af279 100755
--- a/flawfinder
+++ b/flawfinder
@@ -1461,7 +1461,8 @@ def process_c_file(f, patch_infos):
     linenumber = 1
     ignoreline = -1
 
-    cpplanguage = f.endswith(".cpp") or f.endswith(".cxx") or f.endswith(".cc")
+    cpplanguage = (f.endswith(".cpp") or f.endswith(".cxx") or f.endswith(".cc")
+                   or f.endswith(".hpp"))
     incomment = 0
     instring = 0
     linebegin = 1