diff --git a/py/parse.c b/py/parse.c
index 48c3048..b939ab8 100644
--- a/py/parse.c
+++ b/py/parse.c
@@ -216,7 +216,7 @@
                 int_val = base * int_val + str[i] - '0';
             } else if (base == 16 && 'a' <= str[i] && str[i] <= 'f') {
                 int_val = base * int_val + str[i] - 'a' + 10;
-            } else if (base == 16 && 'F' <= str[i] && str[i] <= 'F') {
+            } else if (base == 16 && 'A' <= str[i] && str[i] <= 'F') {
                 int_val = base * int_val + str[i] - 'A' + 10;
             } else if (str[i] == '.' || str[i] == 'e' || str[i] == 'E' || str[i] == 'j' || str[i] == 'J') {
                 dec = true;