diff --git a/c/gtkmm_hello/CMakeLists.txt b/c/gtk-hello/CMakeLists.txt
similarity index 72%
rename from c/gtkmm_hello/CMakeLists.txt
rename to c/gtk-hello/CMakeLists.txt
index d931bff..8d170d7 100644
--- a/c/gtkmm_hello/CMakeLists.txt
+++ b/c/gtk-hello/CMakeLists.txt
@@ -1,4 +1,4 @@
-project (gtkmm_Hello)
+project (gtk_hello)
 
 cmake_minimum_required (VERSION 2.6)
 
@@ -11,5 +11,5 @@ link_directories (${GTK2_LIBRARY_DIRS})
 add_definitions (${GTK2_CFLAGS_OTHER})
 
 # add the executable
-add_executable (gtkmm_Hello gtkmm_Hello.c)
-target_link_libraries (gtkmm_Hello ${GTK2_LIBRARIES})
+add_executable (gtk_hello gtk_hello.c)
+target_link_libraries (gtk_hello ${GTK2_LIBRARIES})
diff --git a/c/gtkmm_hello/gtkmm_Hello.c b/c/gtk-hello/gtk_hello.c
similarity index 100%
rename from c/gtkmm_hello/gtkmm_Hello.c
rename to c/gtk-hello/gtk_hello.c