1 files changed, 4 insertions, 1 deletions
diff --git a/lib/libm/sin.c b/lib/libm/sin.c
index d836c705..4eff1001 100644
--- a/lib/libm/sin.c
+++ b/lib/libm/sin.c
@@ -40,7 +40,10 @@
  *      TRIG(x) returns trig(x) nearly rounded
  */
 
-#include "libm.h"
+#include "libm.h" // for __sin, __cos, __rem_pio2, FORCE_EVAL, GET_HIGH_WORD
+
+#include <math.h>   // for sin
+#include <stdint.h> // for uint32_t
 
 double sin(double x)
 {