diff --git a/extlib/benz/gc.c b/extlib/benz/gc.c
index b441d786..d9bda339 100644
--- a/extlib/benz/gc.c
+++ b/extlib/benz/gc.c
@@ -521,26 +521,14 @@ gc_mark(pic_state *pic, pic_value v)
 static void
 gc_mark_global_symbols(pic_state *pic)
 {
-  M(sDEFINE); M(sLAMBDA); M(sIF); M(sBEGIN); M(sQUOTE); M(sSETBANG);
-  M(sQUASIQUOTE); M(sUNQUOTE); M(sUNQUOTE_SPLICING);
-  M(sSYNTAX_QUOTE); M(sSYNTAX_QUASIQUOTE); M(sSYNTAX_UNQUOTE);
-  M(sSYNTAX_UNQUOTE_SPLICING);
-  M(sDEFINE_MACRO); M(sIMPORT); M(sEXPORT);
-  M(sDEFINE_LIBRARY);
-  M(sCOND_EXPAND); M(sAND); M(sOR); M(sELSE); M(sLIBRARY);
-  M(sONLY); M(sRENAME); M(sPREFIX); M(sEXCEPT);
-  M(sCONS); M(sCAR); M(sCDR); M(sNILP);
-  M(sSYMBOLP); M(sPAIRP);
-  M(sADD); M(sSUB); M(sMUL); M(sDIV); M(sMINUS);
-  M(sEQ); M(sLT); M(sLE); M(sGT); M(sGE); M(sNOT);
+  M(sQUOTE); M(sQUASIQUOTE); M(sUNQUOTE); M(sUNQUOTE_SPLICING);
+  M(sSYNTAX_QUOTE); M(sSYNTAX_QUASIQUOTE); M(sSYNTAX_UNQUOTE); M(sSYNTAX_UNQUOTE_SPLICING);
+  M(sDEFINE_LIBRARY); M(sIMPORT); M(sEXPORT); M(sCOND_EXPAND);
   M(sREAD); M(sFILE);
-  M(sCALL); M(sTAILCALL); M(sCALL_WITH_VALUES); M(sTAILCALL_WITH_VALUES);
-  M(sGREF); M(sLREF); M(sCREF); M(sRETURN);
+  M(sCALL); M(sGREF); M(sLREF); M(sCREF);
 
-  M(uDEFINE); M(uLAMBDA); M(uIF); M(uBEGIN); M(uQUOTE); M(uSETBANG);
-  M(uDEFINE_MACRO); M(uIMPORT); M(uEXPORT);
-  M(uDEFINE_LIBRARY);
-  M(uCOND_EXPAND);
+  M(uDEFINE); M(uLAMBDA); M(uIF); M(uBEGIN); M(uQUOTE); M(uSETBANG); M(uDEFINE_MACRO);
+  M(uDEFINE_LIBRARY); M(uIMPORT); M(uEXPORT); M(uCOND_EXPAND);
   M(uCONS); M(uCAR); M(uCDR); M(uNILP);
   M(uSYMBOLP); M(uPAIRP);
   M(uADD); M(uSUB); M(uMUL); M(uDIV);
diff --git a/extlib/benz/include/picrin.h b/extlib/benz/include/picrin.h
index 7479ab60..a52fad61 100644
--- a/extlib/benz/include/picrin.h
+++ b/extlib/benz/include/picrin.h
@@ -95,31 +95,16 @@ struct pic_state {
 
   struct pic_lib *lib, *prev_lib;
 
-  pic_sym *sDEFINE, *sLAMBDA, *sIF, *sBEGIN, *sQUOTE, *sSETBANG;
-  pic_sym *sQUASIQUOTE, *sUNQUOTE, *sUNQUOTE_SPLICING;
-  pic_sym *sSYNTAX_QUOTE, *sSYNTAX_QUASIQUOTE, *sSYNTAX_UNQUOTE;
-  pic_sym *sSYNTAX_UNQUOTE_SPLICING;
-  pic_sym *sDEFINE_MACRO, *sIMPORT, *sEXPORT;
-  pic_sym *sDEFINE_LIBRARY;
-  pic_sym *sCOND_EXPAND, *sAND, *sOR, *sELSE, *sLIBRARY;
-  pic_sym *sONLY, *sRENAME, *sPREFIX, *sEXCEPT;
-  pic_sym *sCONS, *sCAR, *sCDR, *sNILP;
-  pic_sym *sSYMBOLP, *sPAIRP;
-  pic_sym *sADD, *sSUB, *sMUL, *sDIV, *sMINUS;
-  pic_sym *sEQ, *sLT, *sLE, *sGT, *sGE, *sNOT;
+  pic_sym *sQUOTE, *sQUASIQUOTE, *sUNQUOTE, *sUNQUOTE_SPLICING;
+  pic_sym *sSYNTAX_QUOTE, *sSYNTAX_QUASIQUOTE, *sSYNTAX_UNQUOTE, *sSYNTAX_UNQUOTE_SPLICING;
+  pic_sym *sDEFINE_LIBRARY, *sIMPORT, *sEXPORT, *sCOND_EXPAND;
+  pic_sym *sGREF, *sCREF, *sLREF, *sCALL;
   pic_sym *sREAD, *sFILE;
-  pic_sym *sGREF, *sCREF, *sLREF;
-  pic_sym *sCALL, *sTAILCALL, *sRETURN;
-  pic_sym *sCALL_WITH_VALUES, *sTAILCALL_WITH_VALUES;
 
-  pic_sym *uDEFINE, *uLAMBDA, *uIF, *uBEGIN, *uQUOTE, *uSETBANG;
-  pic_sym *uDEFINE_MACRO, *uIMPORT, *uEXPORT;
-  pic_sym *uDEFINE_LIBRARY;
-  pic_sym *uCOND_EXPAND;
-  pic_sym *uCONS, *uCAR, *uCDR, *uNILP;
-  pic_sym *uSYMBOLP, *uPAIRP;
-  pic_sym *uADD, *uSUB, *uMUL, *uDIV;
-  pic_sym *uEQ, *uLT, *uLE, *uGT, *uGE, *uNOT;
+  pic_sym *uDEFINE, *uLAMBDA, *uIF, *uBEGIN, *uQUOTE, *uSETBANG, *uDEFINE_MACRO;
+  pic_sym *uDEFINE_LIBRARY, *uIMPORT, *uEXPORT, *uCOND_EXPAND;
+  pic_sym *uCONS, *uCAR, *uCDR, *uNILP, *uSYMBOLP, *uPAIRP;
+  pic_sym *uADD, *uSUB, *uMUL, *uDIV, *uEQ, *uLT, *uLE, *uGT, *uGE, *uNOT;
   pic_sym *uVALUES, *uCALL_WITH_VALUES;
 
   struct pic_lib *PICRIN_BASE;
diff --git a/extlib/benz/state.c b/extlib/benz/state.c
index 9f5cb702..51788c6f 100644
--- a/extlib/benz/state.c
+++ b/extlib/benz/state.c
@@ -284,11 +284,6 @@ pic_open(pic_allocf allocf, void *userdata)
 
 #define S(slot,name) pic->slot = pic_intern_cstr(pic, name)
 
-  S(sDEFINE, "define");
-  S(sLAMBDA, "lambda");
-  S(sIF, "if");
-  S(sBEGIN, "begin");
-  S(sSETBANG, "set!");
   S(sQUOTE, "quote");
   S(sQUASIQUOTE, "quasiquote");
   S(sUNQUOTE, "unquote");
@@ -297,46 +292,16 @@ pic_open(pic_allocf allocf, void *userdata)
   S(sSYNTAX_QUASIQUOTE, "syntax-quasiquote");
   S(sSYNTAX_UNQUOTE, "syntax-unquote");
   S(sSYNTAX_UNQUOTE_SPLICING, "syntax-unquote-splicing");
-  S(sDEFINE_MACRO, "define-macro");
   S(sIMPORT, "import");
   S(sEXPORT, "export");
   S(sDEFINE_LIBRARY, "define-library");
   S(sCOND_EXPAND, "cond-expand");
-  S(sAND, "and");
-  S(sOR, "or");
-  S(sELSE, "else");
-  S(sLIBRARY, "library");
-  S(sONLY, "only");
-  S(sRENAME, "rename");
-  S(sPREFIX, "prefix");
-  S(sEXCEPT, "except");
-  S(sCONS, "cons");
-  S(sCAR, "car");
-  S(sCDR, "cdr");
-  S(sNILP, "null?");
-  S(sSYMBOLP, "symbol?");
-  S(sPAIRP, "pair?");
-  S(sADD, "+");
-  S(sSUB, "-");
-  S(sMUL, "*");
-  S(sDIV, "/");
-  S(sMINUS, "minus");
-  S(sEQ, "=");
-  S(sLT, "<");
-  S(sLE, "<=");
-  S(sGT, ">");
-  S(sGE, ">=");
-  S(sNOT, "not");
   S(sREAD, "read");
   S(sFILE, "file");
   S(sCALL, "call");
-  S(sTAILCALL, "tail-call");
   S(sGREF, "gref");
   S(sLREF, "lref");
   S(sCREF, "cref");
-  S(sRETURN, "return");
-  S(sCALL_WITH_VALUES, "call-with-values");
-  S(sTAILCALL_WITH_VALUES, "tailcall-with-values");
 
   pic_gc_arena_restore(pic, ai);
 
diff --git a/extlib/benz/symbol.c b/extlib/benz/symbol.c
index 772ecf96..b31f7962 100644
--- a/extlib/benz/symbol.c
+++ b/extlib/benz/symbol.c
@@ -32,7 +32,7 @@ pic_intern_cstr(pic_state *pic, const char *cstr)
   strcpy(copy, cstr);
   kh_key(h, it) = copy;
 
-  kh_val(h, it) = pic->sDEFINE; /* insert dummy */
+  kh_val(h, it) = pic->sQUOTE; /* insert dummy */
 
   sym = (pic_sym *)pic_obj_alloc(pic, sizeof(pic_sym), PIC_TT_SYMBOL);
   sym->cstr = copy;