1diff --git a/admin/Makefile.def b/admin/Makefile.def
2index 27a1c02..43ef322 100644
3--- a/admin/Makefile.def
4+++ b/admin/Makefile.def
5@@ -228,7 +228,7 @@ GLOBAL_DIRTY = $(builddir) *~ TAGS ChangeLog* Makefile.bak
6 # Fortran preprocessing
7
8 # Preprocessor command
9-CPP = cpp
10+CPP = $(GAG_CPP)
11
12 # Preprocessor generic flags
13 GLOBAL_CPPFLAGS += -P -traditional -C