diff --git a/README.md b/README.md
index 7ca0302f..fafd1b68 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ https://github.com/wasabiz/picrin
 
 	built executable binary will be under bin/ directory and shared library `libpicrin.so` under lib/.
 	
-	If you want to build picrin on other systems than x86_64, make sure PIC_NAN_BOXING flag is turned off (see include/picconf.h for detail).
+	If you want to build picrin on other systems than x86_64, make sure PIC_NAN_BOXING flag is turned off (see include/config.h for detail).
 
 - run
 
diff --git a/include/picconf.h b/include/config.h
similarity index 100%
rename from include/picconf.h
rename to include/config.h
diff --git a/include/picrin.h b/include/picrin.h
index d5589726..17c7a7d4 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -6,7 +6,7 @@
 #include <setjmp.h>
 #include <stdio.h>
 
-#include "picconf.h"
+#include "config.h"
 #include "picrin/value.h"
 
 struct pic_code;