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-rw-r--r--src/PJ_gall.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/PJ_gall.c b/src/PJ_gall.c
index ca8a1bcb..a8697482 100644
--- a/src/PJ_gall.c
+++ b/src/PJ_gall.c
@@ -1,4 +1,7 @@
#define PJ_LIB__
+
+#include <math.h>
+
#include "projects.h"
PROJ_HEAD(gall, "Gall (Gall Stereographic)") "\n\tCyl, Sph";
@@ -39,5 +42,3 @@ PJ *PROJECTION(gall) {
return P;
}
-
-