diff --git a/boot-lib.h b/boot-lib.h
index c3b7777..4ed452f 100644
--- a/boot-lib.h
+++ b/boot-lib.h
@@ -1,12 +1,9 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 // std
 int printf(const char* format, ...);
 int getchar();
-int putchar(int ch);
-int strcmp(const char* s1, const char* s2);
 void exit(int status);
 
 // ext
diff --git a/boot.c b/boot.c
index 9bce0e8..33ff623 100644
--- a/boot.c
+++ b/boot.c
@@ -103,6 +103,13 @@ int get_escaped_char() {
     return ch;
 }
 
+int streq(const char* s1, const char* s2) {
+    while (*s1 && *s2 && *s1 == *s2) {
+        s1++;
+        s2++;
+    }
+    return *s1 == *s2;
+}
 
 char string_table[65536];
 int string_offset;
@@ -148,7 +155,7 @@ void dedup_id() {
     char* latest = &id_table[id_lut[id_lut_size - 1]];
     for (int i = 0; i < id_lut_size - 1; i++) {
         char* candidate = &id_table[id_lut[i]];
-        if (!strcmp(candidate, latest)) {
+        if (streq(candidate, latest)) {
             rewind_id(i);
             return;
         }
@@ -159,27 +166,27 @@ void parse_id_like(int ch) {
     token_type = TOKEN_ID;
     token_data = parse_id(ch);
     char* id = &id_table[id_lut[token_data]];
-    if (!strcmp(id, "int")) {
+    if (streq(id, "int")) {
         token_type = TOKEN_INT;
-    } else if (!strcmp(id, "if")) {
+    } else if (streq(id, "if")) {
         token_type = TOKEN_IF;
-    } else if (!strcmp(id, "else")) {
+    } else if (streq(id, "else")) {
         token_type = TOKEN_ELSE;
-    } else if (!strcmp(id, "while")) {
+    } else if (streq(id, "while")) {
         token_type = TOKEN_WHILE;
-    } else if (!strcmp(id, "break")) {
+    } else if (streq(id, "break")) {
         token_type = TOKEN_BREAK;
-    } else if (!strcmp(id, "continue")) {
+    } else if (streq(id, "continue")) {
         token_type = TOKEN_CONTINUE;
-    } else if (!strcmp(id, "return")) {
+    } else if (streq(id, "return")) {
         token_type = TOKEN_RETURN;
-    } else if (!strcmp(id, "void")) {
+    } else if (streq(id, "void")) {
         token_type = TOKEN_VOID;
-    } else if (!strcmp(id, "const")) {
+    } else if (streq(id, "const")) {
         token_type = TOKEN_CONST;
-    } else if (!strcmp(id, "char")) {
+    } else if (streq(id, "char")) {
         token_type = TOKEN_CHAR;
-    } else if (!strcmp(id, "for")) {
+    } else if (streq(id, "for")) {
         token_type = TOKEN_FOR;
     }
     if (token_type != TOKEN_ID) {
@@ -1295,7 +1302,7 @@ void dump_string_table() {
             } else if (ch == '\"') {
                 printf("\\\"");
             } else {
-                putchar(ch);
+                printf("%c", ch);
             }
             offset++;
         }