diff --git a/examples/c++/class.c b/examples/c++/class.cpp
similarity index 96%
rename from examples/c++/class.c
rename to examples/c++/class.cpp
index fc575b7..1ed51f7 100644
--- a/examples/c++/class.c
+++ b/examples/c++/class.cpp
@@ -4,7 +4,7 @@ This trivial Elk extension demonstrates encapsulation of a C++ class in
 a first-class Scheme type, and encapsulation of member functions in
 Scheme primitives.
 
-See constructor.c in this directory for compilation instructions.
+See constructor.cpp in this directory for compilation instructions.
 
 Here is a transcript showing a test run under Linux using the
 GNU g++ compiler:
diff --git a/examples/c++/constructor.c b/examples/c++/constructor.cpp
similarity index 100%
rename from examples/c++/constructor.c
rename to examples/c++/constructor.cpp