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-rw-r--r--lib/libm/tanf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/libm/tanf.c b/lib/libm/tanf.c
index ef808637..f005908f 100644
--- a/lib/libm/tanf.c
+++ b/lib/libm/tanf.c
@@ -16,7 +16,7 @@
#include "libm.h" // for __tandf, __rem_pio2f, FORCE_EVAL, GET_FLOAT_WORD
-#include <math.h> // for M_PI_2, tanf
+#include <math.h> // for M_PI_2, tanf, NAN
#include <stdint.h> // for uint32_t
/* Small multiples of pi/2 rounded to double precision. */