diff --git a/src/jswrap_math.c b/src/jswrap_math.c
index d0346cc1d1..74cd146ce9 100644
--- a/src/jswrap_math.c
+++ b/src/jswrap_math.c
@@ -145,15 +145,12 @@ This is a standard JavaScript class that contains useful Maths routines
   "type" : "staticmethod",
   "class" : "Math",
   "name" : "abs",
-  "generate" : "jswrap_math_abs",
+  "generate" : "fabs",
   "params" : [
     ["x","float","A floating point value"]
   ],
   "return" : ["float","The absolute value of x (eg, ```Math.abs(2)==2```, but also ```Math.abs(-2)==2```)"]
 }*/
-JsVarFloat jswrap_math_abs(JsVarFloat x) {
-  return (x<0)?-x:x;
-}
 /*JSON{
   "type" : "staticmethod",
   "ifndef" : "SAVE_ON_FLASH_EXTREME",
diff --git a/src/jswrap_math.h b/src/jswrap_math.h
index 25f83b58d7..90840ae556 100644
--- a/src/jswrap_math.h
+++ b/src/jswrap_math.h
@@ -25,7 +25,6 @@
 
 
 JsVarInt jswrap_integer_valueOf(JsVar *v);
-JsVarFloat jswrap_math_abs(JsVarFloat x);
 JsVarFloat jswrap_math_asin(JsVarFloat x);
 double jswrap_math_mod(double x, double y);
 double jswrap_math_pow(double x, double y);