diff --git a/src/math/modfl.c b/src/math/modfl.c
index fc85bb58f78f6443069a40b8648e0017dc62078e..f736bba4d95cc017bae7f65078b9f3a8c1ecd9a4 100644
--- a/src/math/modfl.c
+++ b/src/math/modfl.c
@@ -14,7 +14,6 @@ long double modfl(long double x, long double *iptr)
 long double modfl(long double x, long double *iptr)
 {
 	union ldshape u = {x};
-	uint64_t mask;
 	int e = (u.i.se & 0x7fff) - 0x3fff;
 	int s = u.i.se >> 15;
 	long double absx;