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-rw-r--r--src/projections/robin.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/projections/robin.cpp b/src/projections/robin.cpp
index c08ac0e2..2e36106a 100644
--- a/src/projections/robin.cpp
+++ b/src/projections/robin.cpp
@@ -1,7 +1,7 @@
#define PJ_LIB__
#include "proj.h"
#include "proj_internal.h"
-#include "proj_math.h"
+#include <math.h>
PROJ_HEAD(robin, "Robinson") "\n\tPCyl, Sph";