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-rw-r--r--src/spherical_line.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/spherical_line.c b/src/spherical_line.c
index 026b5a8..2477dd8 100644
--- a/src/spherical_line.c
+++ b/src/spherical_line.c
@@ -3,6 +3,9 @@
iem_matrix written by Thomas Musil (c) IEM KUG Graz Austria 2002 - 2006 */
+#include "m_pd.h"
+#include "math.h"
+
/* -------------------------- spherical_line ------------------------------ */
typedef struct _spherical_line