diff --git a/makefile b/makefile
index c4f6a87..82f4032 100644
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
 0:libregex.so
 	./regex.k
 libregex.so:regex.c
-	$(CC) -shared -fPIC $^ -L../.. -lk -L /opt/homebrew/lib -lonig -o $@
+	$(CC) -shared -fPIC $^ -I ../.. -L ../.. -I /opt/homebrew/include -L /opt/homebrew/lib -lk -lonig -o $@
diff --git a/utils.c b/utils.c
index 6489506..342f5b7 100644
--- a/utils.c
+++ b/utils.c
@@ -1,6 +1,6 @@
 #include <stddef.h>
 #include "../../k.h"
-#include "/opt/homebrew/include/oniguruma.h"
+#include <oniguruma.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>