diff --git a/Makefile b/Makefile
index 5d5eef4..679ff8b 100644
--- a/Makefile
+++ b/Makefile
@@ -30,5 +30,5 @@ mbb_rook.h: codegen
 mbb_bishop.h: codegen
 	./codegen
 
-tests: tests.c mbb_rook.h mbb_bishop.h base.h
+tests: tests.c mbb_rook.h mbb_bishop.h engine.h
 	$(CC) -o $@ $(CFLAGS) tests.c
diff --git a/codegen.c b/codegen.c
index 8859586..dcaf1ea 100644
--- a/codegen.c
+++ b/codegen.c
@@ -1,5 +1,7 @@
 #define CODEGEN
-#include "base.h"
+#include "engine.h"
+#include "libc-lite.h"
+#include "board_print.h"
 #include <stdlib.h>
 #include <stdio.h>
 
@@ -64,7 +66,7 @@ int main()
 
             /* brute force the magic number */
             for (;;) { 
-                bitboard magic = rand64() & rand64() & rand64();
+                bitboard magic = my_rand64() & my_rand64() & my_rand64();
 
                 bitboard atk = 0ULL;
                 for (bitboard test = 0; test < (1ULL<<rook_relevant_bits_count); test++) {
@@ -120,7 +122,7 @@ int main()
             /* brute force the magic number */
             bitboard magic = 0ULL;
             for (;;) { 
-                magic = rand64() & rand64() & rand64();
+                magic = my_rand64() & my_rand64() & my_rand64();
 
                 bitboard atk = 0ULL;
                 for (bitboard test = 0; test < (1ULL<<bishop_relevant_bits_count); test++) {
diff --git a/base.h b/engine.h
similarity index 100%
rename from base.h
rename to engine.h
diff --git a/libc-lite.h b/libc-lite.h
index 082847e..c2f2fd6 100644
--- a/libc-lite.h
+++ b/libc-lite.h
@@ -1,4 +1,6 @@
 
+#pragma once
+
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
diff --git a/tests.c b/tests.c
index d23deb0..2bb2d86 100644
--- a/tests.c
+++ b/tests.c
@@ -2,7 +2,7 @@
 #define _XOPEN_SOURCE 500
 #include <unistd.h> /* usleep */
 
-#include "base.h"
+#include "engine.h"
 #include "board_print.h"
 
 #include <stdio.h>
diff --git a/wasm-compat.c b/wasm-compat.c
index 07e819a..8b36033 100644
--- a/wasm-compat.c
+++ b/wasm-compat.c
@@ -1,5 +1,5 @@
 
-#include "base.h"
+#include "engine.h"
 
 #include <stdint.h>