diff --git a/doxygen.conf b/doxygen.conf
index 8f25cfa8f..1189d7f2f 100644
--- a/doxygen.conf
+++ b/doxygen.conf
@@ -7,9 +7,10 @@ GENERATE_TODOLIST = YES
 GENERATE_TESTLIST = YES
 
 # Input
-INPUT         = src
-FILE_PATTERNS = *.h *.cpp
-RECURSIVE     = YES
+INPUT             = src
+FILE_PATTERNS     = *.h *.cpp
+EXTENSION_MAPPING = h=C++
+RECURSIVE         = YES
 
 # Output
 OUTPUT_DIRECTORY = doc