diff --git a/book/src/05_language_reference/02_lexical_structure/02_number.md b/book/src/05_language_reference/02_lexical_structure/02_number.md
index 9247b2c0..3c305105 100644
--- a/book/src/05_language_reference/02_lexical_structure/02_number.md
+++ b/book/src/05_language_reference/02_lexical_structure/02_number.md
@@ -19,9 +19,9 @@
 # +
 
 // octal
-32'o01234567xzXZ
+36'o01234567xzXZ
 # +
-32'o01_23_45_67_xz_XZ
+36'o01_23_45_67_xz_XZ
 # +
 
 // decimal