diff --git a/src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/gsmopen_protocol.cpp b/src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/gsmopen_protocol.c
similarity index 100%
rename from src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/gsmopen_protocol.cpp
rename to src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/gsmopen_protocol.c
diff --git a/src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/mod_gsmopen.cpp b/src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/mod_gsmopen.c
similarity index 100%
rename from src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/mod_gsmopen.cpp
rename to src/mod/endpoints/mod_gsmopen/alsa_nogsmlib_nocplusplus/mod_gsmopen/mod_gsmopen.c