diff --git a/include/picrin.h b/include/picrin.h
index 6756a648..2d14dc68 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -87,8 +87,7 @@ typedef struct {
   pic_sym sEQ, sLT, sLE, sGT, sGE, sNOT;
 
   pic_sym rDEFINE, rLAMBDA, rIF, rBEGIN, rQUOTE, rSETBANG;
-  pic_sym rDEFINE_SYNTAX, rDEFINE_MACRO;
-  pic_sym rLET_SYNTAX, rLETREC_SYNTAX;
+  pic_sym rDEFINE_SYNTAX, rDEFINE_MACRO, rLET_SYNTAX;
   pic_sym rDEFINE_LIBRARY, rIMPORT, rEXPORT;
 
   xhash syms;                   /* name to symbol */
diff --git a/src/state.c b/src/state.c
index 6be7da78..9da1852c 100644
--- a/src/state.c
+++ b/src/state.c
@@ -131,7 +131,6 @@ pic_open(int argc, char *argv[], char **envp)
   register_renamed_symbol(pic, rDEFINE_SYNTAX, "define-syntax");
   register_renamed_symbol(pic, rDEFINE_MACRO, "define-macro");
   register_renamed_symbol(pic, rLET_SYNTAX, "let-syntax");
-  register_renamed_symbol(pic, rLETREC_SYNTAX, "letrec-syntax");
   register_renamed_symbol(pic, rDEFINE_LIBRARY, "define-library");
   register_renamed_symbol(pic, rIMPORT, "import");
   register_renamed_symbol(pic, rEXPORT, "export");