diff --git a/py/builtinmath.c b/py/builtinmath.c
index fa6a99f762..b814822531 100644
--- a/py/builtinmath.c
+++ b/py/builtinmath.c
@@ -57,7 +57,7 @@ MATH_FUN_1(trunc, trunc)
 MATH_FUN_2(ldexp, ldexp)
 MATH_FUN_1(erf, erf)
 MATH_FUN_1(erfc, erfc)
-MATH_FUN_1(gamma, gamma)
+MATH_FUN_1(gamma, tgamma)
 MATH_FUN_1(lgamma, lgamma)
 //TODO: factorial, fsum