diff --git a/src/Core/p2/iMix.cpp b/src/Core/p2/iMix.c
similarity index 100%
rename from src/Core/p2/iMix.cpp
rename to src/Core/p2/iMix.c
diff --git a/src/Core/p2/ngcrad3d.cpp b/src/Core/p2/ngcrad3d.c
similarity index 100%
rename from src/Core/p2/ngcrad3d.cpp
rename to src/Core/p2/ngcrad3d.c