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-rw-r--r--src/PJ_cass.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/PJ_cass.cpp b/src/PJ_cass.cpp
index cc610940..2488f405 100644
--- a/src/PJ_cass.cpp
+++ b/src/PJ_cass.cpp
@@ -15,10 +15,12 @@ PROJ_HEAD(cass, "Cassini") "\n\tCyl, Sph&Ell";
# define C5 .06666666666666666666
+namespace { // anonymous namespace
struct pj_opaque {
double *en;
double m0;
};
+} // anonymous namespace