diff --git a/CMakeLists.txt b/CMakeLists.txt
index 321dce4..7d24654 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,9 +9,9 @@ include( cmake/rules.cmake )
 
 add_library( alepha SHARED
 	Console.cc
-	ProgramOptions.cpp
-	string_algorithms.cpp
-	word_wrap.cpp
+	ProgramOptions.cc
+	string_algorithms.cc
+	word_wrap.cc
 )
 # Everything else depends upon it
 link_libraries( alepha )
diff --git a/ProgramOptions.cpp b/ProgramOptions.cc
similarity index 100%
rename from ProgramOptions.cpp
rename to ProgramOptions.cc
diff --git a/string_algorithms.cpp b/string_algorithms.cc
similarity index 100%
rename from string_algorithms.cpp
rename to string_algorithms.cc
diff --git a/word_wrap.cpp b/word_wrap.cc
similarity index 100%
rename from word_wrap.cpp
rename to word_wrap.cc