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-rw-r--r--src/projections/isea.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/projections/isea.cpp b/src/projections/isea.cpp
index c22e143d..b1841338 100644
--- a/src/projections/isea.cpp
+++ b/src/projections/isea.cpp
@@ -15,7 +15,7 @@
#define PJ_LIB__
#include "proj.h"
#include "proj_internal.h"
-#include "proj_math.h"
+#include <math.h>
#define DEG36 0.62831853071795864768
#define DEG72 1.25663706143591729537