1 files changed, 2 insertions, 1 deletions
diff --git a/Modules/cmathmodule.c b/Modules/cmathmodule.c
index d12e4c50cd..7f6c2c9df4 100644
--- a/Modules/cmathmodule.c
+++ b/Modules/cmathmodule.c
@@ -986,9 +986,10 @@ cmath_polar_impl(PyModuleDef *module, Py_complex z)
 {
     double r, phi;
 
+    errno = 0;
     PyFPE_START_PROTECT("polar function", return 0)
     phi = c_atan2(z); /* should not cause any exception */
-    r = _Py_c_abs(z); /* sets errno to ERANGE on overflow;  otherwise 0 */
+    r = _Py_c_abs(z); /* sets errno to ERANGE on overflow */
     PyFPE_END_PROTECT(r)
     if (errno != 0)
         return math_error();