diff --git a/TODO.md b/TODO.md
index e64b2c6..5c20b3d 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,7 +1,7 @@
-0. Create file to describe properties of terminology used; param, arg, var, &c.
-1. Differenciate parameters and arguments -- params for function definitions,
+1. Differentiate parameters and arguments -- params for function definitions,
 arguments for function calls
-2. Add scope field to all ASTs, and new scope layer for those that need it.
 
 Change editor to GNU Readline.
 Make variables persist through lines in the editor.
+
+Return syntax errors as exceptions.
diff --git a/src/grammar.y b/src/grammar.y
index 1019d5a..c5375c5 100644
--- a/src/grammar.y
+++ b/src/grammar.y
@@ -125,11 +125,11 @@ exp:
     NUM { $$ = ast_init(AST_TYPE_NUM, ast_num_data_init($1)); }
 
     // Function definitions.
-    | WORD GROUPS arg GROUPE EQ exp {
+    | WORD GROUPS arg GROUPE exp {
         size_t argc = $3->ln;
         AST** argv = $3->buf;
         argarr_destroypsv($3);
-        $$ = ast_init(AST_TYPE_FDEF, ast_fdef_data_init($1, argc, argv, $6));
+        $$ = ast_init(AST_TYPE_FDEF, ast_fdef_data_init($1, argc, argv, $5));
     }
 
     | BLOCKS block BLOCKE {