diff --git a/extlib/benz/codegen.c b/extlib/benz/codegen.c
index a31b8305..3bc11e0b 100644
--- a/extlib/benz/codegen.c
+++ b/extlib/benz/codegen.c
@@ -732,13 +732,6 @@ codegen_context_destroy(pic_state *pic, codegen_context *cxt)
     cxt->clen++;                                \
   } while (0)                                   \
 
-#define emit_c(pic, cxt, ins, C) do {           \
-    check_code_size(pic, cxt);                  \
-    cxt->code[cxt->clen].insn = ins;            \
-    cxt->code[cxt->clen].u.c = C;               \
-    cxt->clen++;                                \
-  } while (0)                                   \
-
 #define emit_r(pic, cxt, ins, D, I) do {        \
     check_code_size(pic, cxt);                  \
     cxt->code[cxt->clen].insn = ins;            \
@@ -981,7 +974,7 @@ codegen_quote(pic_state *pic, codegen_context *cxt, pic_value obj, bool tailpos)
     emit_ret(pic, cxt, tailpos);
     break;
   case PIC_TT_CHAR:
-    emit_c(pic, cxt, OP_PUSHCHAR, pic_char(obj));
+    emit_i(pic, cxt, OP_PUSHCHAR, pic_char(obj));
     emit_ret(pic, cxt, tailpos);
     break;
   default:
diff --git a/extlib/benz/include/picrin/irep.h b/extlib/benz/include/picrin/irep.h
index efa5fc6e..872f3d23 100644
--- a/extlib/benz/include/picrin/irep.h
+++ b/extlib/benz/include/picrin/irep.h
@@ -13,7 +13,6 @@ typedef struct {
   int insn;
   union {
     int i;
-    char c;
     struct {
       int depth;
       int idx;
diff --git a/extlib/benz/vm.c b/extlib/benz/vm.c
index 3e73578d..6e846c20 100644
--- a/extlib/benz/vm.c
+++ b/extlib/benz/vm.c
@@ -411,7 +411,7 @@ pic_apply(pic_state *pic, struct pic_proc *proc, int argc, pic_value *argv)
       NEXT;
     }
     CASE(OP_PUSHCHAR) {
-      PUSH(pic_char_value(c.u.c));
+      PUSH(pic_char_value(c.u.i));
       NEXT;
     }
     CASE(OP_PUSHCONST) {