diff --git a/Nasal/math.nas b/Nasal/math.nas
index 838856e14..ee8a5ef13 100644
--- a/Nasal/math.nas
+++ b/Nasal/math.nas
@@ -1,6 +1,7 @@
 var abs = func(n) { n < 0 ? -n : n }
 
 var sgn = func(x) { x < 0 ? -1 : x > 0 }
+var sign = sgn;
 
 var max = func(x) {
     var n = x;
@@ -46,4 +47,4 @@ var log10 = func(x) { ln(x) * _iln10 }
 
 var approx_eq = func (a,b, d = 0.000001) {
     return (abs(a-b) < d);
-}
\ No newline at end of file
+}