diff --git a/bn_mp_read_radix.c b/bn_mp_read_radix.c
index 1f2629f..e82fc3a 100644
--- a/bn_mp_read_radix.c
+++ b/bn_mp_read_radix.c
@@ -44,7 +44,7 @@ int mp_read_radix (mp_int * a, const char *str, int radix)
   
   /* process each digit of the string */
   while (*str) {
-    /* if the radix < 36 the conversion is case insensitive
+    /* if the radix <= 36 the conversion is case insensitive
      * this allows numbers like 1AB and 1ab to represent the same  value
      * [e.g. in hex]
      */