diff --git a/Modules/GraphAlgorithms/itkShortestPathCostFunction.txx b/Modules/GraphAlgorithms/itkShortestPathCostFunction.cpp
similarity index 100%
rename from Modules/GraphAlgorithms/itkShortestPathCostFunction.txx
rename to Modules/GraphAlgorithms/itkShortestPathCostFunction.cpp
diff --git a/Modules/GraphAlgorithms/itkShortestPathCostFunctionTbss.txx b/Modules/GraphAlgorithms/itkShortestPathCostFunctionTbss.cpp
similarity index 100%
rename from Modules/GraphAlgorithms/itkShortestPathCostFunctionTbss.txx
rename to Modules/GraphAlgorithms/itkShortestPathCostFunctionTbss.cpp
diff --git a/Modules/GraphAlgorithms/itkShortestPathImageFilter.txx b/Modules/GraphAlgorithms/itkShortestPathImageFilter.cpp
similarity index 100%
rename from Modules/GraphAlgorithms/itkShortestPathImageFilter.txx
rename to Modules/GraphAlgorithms/itkShortestPathImageFilter.cpp