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-rw-r--r--src/PJ_wink1.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/PJ_wink1.cpp b/src/PJ_wink1.cpp
index 6640f995..e466988f 100644
--- a/src/PJ_wink1.cpp
+++ b/src/PJ_wink1.cpp
@@ -7,9 +7,11 @@
PROJ_HEAD(wink1, "Winkel I") "\n\tPCyl, Sph\n\tlat_ts=";
+namespace { // anonymous namespace
struct pj_opaque {
double cosphi1;
};
+} // anonymous namespace