diff --git a/include/patty/ax25/macros.h b/include/patty/ax25/macros.h
index d20f2fb..55aa2a3 100644
--- a/include/patty/ax25/macros.h
+++ b/include/patty/ax25/macros.h
@@ -62,7 +62,7 @@
     (((c & 0xe0) == 0x40) && ((c & 0x0f) == 0x07))
 
 #define PATTY_AX25_CONTROL_UNNUMBERED_INFO(c) \
-    (((c & 0xe0) == 0x00) && (c & 0x03))
+    (((c & 0xe0) == 0x00) && ((c & 0x0f) == 0x03))
 
 #define PATTY_AX25_CONTROL_SEQ_SEND(c) \
     ((c & 0x0e) >> 1)