diff --git a/Python/pystrtod.c b/Python/pystrtod.c
index e1c84ea..6c19b45 100644
--- a/Python/pystrtod.c
+++ b/Python/pystrtod.c
@@ -90,6 +90,13 @@
 				p++;
 			end = p;
 		}
+		else if (strncmp(p, decimal_point, decimal_point_len) == 0)
+		{
+			/* Python bug #1417699 */
+			*endptr = (char*)nptr;
+			errno = EINVAL;
+			return val;
+		}
 		/* For the other cases, we need not convert the decimal point */
 	}