diff --git a/readme.md b/readme.md
index 404e56a..764bfcf 100644
--- a/readme.md
+++ b/readme.md
@@ -64,7 +64,8 @@ For the arguments of each instruction see the previous section.
 
 Address arguments can be either absolute addresses or references to or
 relative to a label. Relative references are of the form LABEL +/- N,
-the spacing being optional.
+the spacing being optional. Note that the assembler does not check for
+addresses or references to reserved addresses.
 
 In addition to the true instructions there are three
 pseudo-instructions. ORG defines the starting address of the program: it
@@ -73,9 +74,6 @@ not required if the starting address is 0. DATA introduces a byte of
 data. ADDR introduces two bytes of data containing the address of its
 argument, a reference to or relative to a label.
 
-Note that the assembler does not check for addresses or references to
-reserved addresses or references to or relative to non-existing labels.
-
 Memory-Mapped Devices
 ---------------------