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-rw-r--r--src/phi2.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/phi2.cpp b/src/phi2.cpp
index a83302e6..1f7b0846 100644
--- a/src/phi2.cpp
+++ b/src/phi2.cpp
@@ -2,6 +2,7 @@
#include <math.h>
+#include "proj.h"
#include "projects.h"
static const double TOL = 1.0e-10;