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-rw-r--r--ell_grid_solve.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ell_grid_solve.c b/ell_grid_solve.c
index 1adb8b2..803bdf2 100644
--- a/ell_grid_solve.c
+++ b/ell_grid_solve.c
@@ -19,6 +19,7 @@
#include <float.h>
#include <errno.h>
+#include <math.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>