diff --git a/cad/netgen/files/patch-ngtcltk::ngappinit.cpp b/cad/netgen/files/patch-ngtcltk_ngappinit.cpp
similarity index 100%
rename from cad/netgen/files/patch-ngtcltk::ngappinit.cpp
rename to cad/netgen/files/patch-ngtcltk_ngappinit.cpp