diff --git a/include/patty/ax25.h b/include/patty/ax25.h
index 05a1bb5..a098f04 100644
--- a/include/patty/ax25.h
+++ b/include/patty/ax25.h
@@ -58,7 +58,7 @@ typedef struct _patty_ax25_if patty_ax25_if;
 #include <patty/ax25/server.h>
 
 #define PATTY_AX25_ADDR_CHAR_VALID(c) \
-    ((c >= 0x20 && c <= 0x5a))
+    ((c >= 0x20 && c <= 0x7e))
 
 #define PATTY_AX25_ADDR_OCTET_LAST(c) \
     ((c & 0x01) == 0x01)