diff --git a/acc/src/acc.y b/acc/src/acc.y
index 3c715ea..7caa7bf 100644
--- a/acc/src/acc.y
+++ b/acc/src/acc.y
@@ -19,9 +19,9 @@ int yyget_lineno();
 %token SCALAR VECTOR MATRIX SCALARFIELD SCALARARRAY
 %token VOID INT INT3 COMPLEX
 %token IF ELSE FOR WHILE ELIF
-%token LEQU LAND LOR LLEQU BINARY_OP
+%token LAND LOR BINARY_OP
 %token KERNEL DEVICE PREPROCESSED
-%token INPLACE_INC INPLACE_DEC INPLACE_ADD INPLACE_SUB
+%token INPLACE_INC INPLACE_DEC
 
 %%
 
@@ -184,12 +184,8 @@ binary_operator: '+'
                | '*'                                                                    { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); $$->infix = yytext[0]; }
                | '<'                                                                    { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); $$->infix = yytext[0]; }
                | '>'                                                                    { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); $$->infix = yytext[0]; }
-               | LEQU                                                                   { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
                | LAND                                                                   { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
                | LOR                                                                    { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
-               | LLEQU                                                                  { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
-               | INPLACE_ADD                                                            { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
-               | INPLACE_SUB                                                            { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
                | BINARY_OP                                                              { $$ = astnode_create(NODE_UNKNOWN, NULL, NULL); astnode_set_buffer(yytext, $$); }
                ;