diff --git a/extlib/benz/eval.c b/extlib/benz/eval.c
index 8fd8adbc..7a55ab54 100644
--- a/extlib/benz/eval.c
+++ b/extlib/benz/eval.c
@@ -10,7 +10,7 @@
 
 static pic_value pic_compile(pic_state *, pic_value);
 
-#define EQ(sym, lit) (strcmp(pic_str(pic, pic_sym_name(pic, sym)), lit) == 0)
+#define EQ(sym, lit) (strcmp(pic_sym(pic, sym), lit) == 0)
 #define S(lit) (pic_intern_lit(pic, lit))
 
 static void
diff --git a/extlib/benz/include/picrin.h b/extlib/benz/include/picrin.h
index 1d5e1ad9..f255d2e3 100644
--- a/extlib/benz/include/picrin.h
+++ b/extlib/benz/include/picrin.h
@@ -122,6 +122,7 @@ double pic_float(pic_state *, pic_value f);
 char pic_char(pic_state *, pic_value c);
 #define pic_bool(pic,b) (! pic_false_p(pic, b))
 const char *pic_str(pic_state *, pic_value str);
+#define pic_sym(pic,s) (pic_str(pic, pic_sym_name(pic, (s))))
 unsigned char *pic_blob(pic_state *, pic_value blob, int *len);
 void *pic_data(pic_state *, pic_value data);
 
diff --git a/extlib/benz/read.c b/extlib/benz/read.c
index 2325e0f8..5db65c72 100644
--- a/extlib/benz/read.c
+++ b/extlib/benz/read.c
@@ -339,10 +339,10 @@ read_minus(pic_state *pic, xFILE *file, int c, struct reader_control *p)
   }
   else {
     sym = read_symbol(pic, file, c, p);
-    if (strcaseeq(pic_str(pic, pic_sym_name(pic, sym)), "-inf.0")) {
+    if (strcaseeq(pic_sym(pic, sym), "-inf.0")) {
       return pic_float_value(pic, -(1.0 / 0.0));
     }
-    if (strcaseeq(pic_str(pic, pic_sym_name(pic, sym)), "-nan.0")) {
+    if (strcaseeq(pic_sym(pic, sym), "-nan.0")) {
       return pic_float_value(pic, -(0.0 / 0.0));
     }
     return sym;
@@ -359,10 +359,10 @@ read_plus(pic_state *pic, xFILE *file, int c, struct reader_control *p)
   }
   else {
     sym = read_symbol(pic, file, c, p);
-    if (strcaseeq(pic_str(pic, pic_sym_name(pic, sym)), "+inf.0")) {
+    if (strcaseeq(pic_sym(pic, sym), "+inf.0")) {
       return pic_float_value(pic, 1.0 / 0.0);
     }
-    if (strcaseeq(pic_str(pic, pic_sym_name(pic, sym)), "+nan.0")) {
+    if (strcaseeq(pic_sym(pic, sym), "+nan.0")) {
       return pic_float_value(pic, 0.0 / 0.0);
     }
     return sym;
diff --git a/extlib/benz/write.c b/extlib/benz/write.c
index ce56943c..bb993503 100644
--- a/extlib/benz/write.c
+++ b/extlib/benz/write.c
@@ -195,7 +195,7 @@ write_pair_help(pic_state *pic, pic_value pair, xFILE *file, struct writer_contr
   }
 }
 
-#define EQ(sym, lit) (strcmp(pic_str(pic, pic_sym_name(pic, sym)), lit) == 0)
+#define EQ(sym, lit) (strcmp(pic_sym(pic, sym), lit) == 0)
 
 static void
 write_pair(pic_state *pic, pic_value pair, xFILE *file, struct writer_control *p)
@@ -273,7 +273,7 @@ write_dict(pic_state *pic, pic_value dict, xFILE *file, struct writer_control *p
 
   xfprintf(pic, file, "#.(dictionary");
   while (pic_dict_next(pic, dict, &it, &key, &val)) {
-    xfprintf(pic, file, " '%s ", pic_str(pic, pic_sym_name(pic, key)));
+    xfprintf(pic, file, " '%s ", pic_sym(pic, key));
     write_core(pic, val, file, p);
   }
   xfprintf(pic, file, ")");
@@ -319,7 +319,7 @@ write_core(pic_state *pic, pic_value obj, xFILE *file, struct writer_control *p)
     xfprintf(pic, file, "%d", pic_int(pic, obj));
     break;
   case PIC_TYPE_SYMBOL:
-    xfprintf(pic, file, "%s", pic_str(pic, pic_sym_name(pic, obj)));
+    xfprintf(pic, file, "%s", pic_sym(pic, obj));
     break;
   case PIC_TYPE_FLOAT:
     write_float(pic, obj, file);