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-rw-r--r--lib/libm/__sindf.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/libm/__sindf.c b/lib/libm/__sindf.c
index cf16370d..b6b9cf42 100644
--- a/lib/libm/__sindf.c
+++ b/lib/libm/__sindf.c
@@ -14,7 +14,9 @@
* ====================================================
*/
-#include "libm.h"
+#include "libm.h" // for __sindf
+
+#include <math.h> // for double_t
/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
static const double S1 = -0x15555554cbac77.0p-55, /* -0.166666666416265235595 */