diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 242bd6f9772..e69aea9f4a4 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -145,7 +145,12 @@ FUNC1(math_ceil, ceil)
 FUNC1(math_cos, cos)
 FUNC1(math_cosh, cosh)
 FUNC1(math_exp, exp)
+#ifdef __MWERKS__
+double myfabs(double x) { return fabs(x); }
+FUNC1(math_fabs, myfabs)
+#else
 FUNC1(math_fabs, fabs)
+#endif
 FUNC1(math_floor, floor)
 FUNC2(math_fmod, fmod)
 FUNC2(math_hypot, hypot)