1 files changed, 7 insertions, 2 deletions
diff --git a/chapter12/docs/12-grammar.md b/chapter12/docs/12-grammar.md
index 8048bb8c..a576bd7a 100644
--- a/chapter12/docs/12-grammar.md
+++ b/chapter12/docs/12-grammar.md
@@ -20,8 +20,13 @@ statement
     | metaStatement
     ;
 
+PRIMTYPE
+    : 'int'
+    | 'flt'
+    ;
+
 field
-    : 'int' IDENTIFIER ';'
+    : PRIMTYPE IDENTIFIER ';'
     ;
 
 fields
@@ -66,7 +71,7 @@ structName
     ;
 
 declStatement
-    : 'int' IDENTIFIER '=' expression ';'
+    : PRIMTYPE IDENTIFIER '=' expression ';'
     | structName IDENTIFIER ('?')? '=' expression ';'
     ;