diff --git a/src/math/nexttoward.c b/src/math/nexttoward.c
index 43f8fee..7355f2f 100644
--- a/src/math/nexttoward.c
+++ b/src/math/nexttoward.c
@@ -38,10 +38,8 @@
 	if (e == 0x7ff)
 		return x + x;
 	/* raise underflow if ux.value is subnormal or zero */
-	if (e == 0) {
-		volatile float z;
-		z = x*x + ux.value*ux.value;
-	}
+	if (e == 0)
+		FORCE_EVAL(x*x + ux.value*ux.value);
 	return ux.value;
 }
 #endif