diff --git a/internals2/opcodes/jmpznz.xml b/internals2/opcodes/jmpznz.xml
index d647cf60e2..4de1657227 100644
--- a/internals2/opcodes/jmpznz.xml
+++ b/internals2/opcodes/jmpznz.xml
@@ -8,7 +8,8 @@
    <![CDATA[
 <?php
 /*
- * Jump to the address if the value is .. ???
+ * Jump to the address given in the operands if the value is zero;
+ * jump to the address given in extended data if nonzero.
  * opcode number: 45
  */
 for($i=0; $i<3; $i++){