1 files changed, 1 insertions, 1 deletions
diff --git a/sin.c b/sin.c
index eee56f359..0f830cfb7 100644
--- a/sin.c
+++ b/sin.c
@@ -104,7 +104,7 @@ mpfr_sin (mpfr_ptr y, mpfr_srcptr x, mp_rnd_t rnd_mode)
 	  MPFR_SET_SAME_SIGN(y, x);
 	  MPFR_RET(0);
 	}
-      MPFR_ASSERTN(1);
+      MPFR_ASSERTN(0);
     }
 
   precy = MPFR_PREC(y);