diff --git a/Makefile b/Makefile
index 340c194..eb46e52 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,19 @@
 CC=bcc
 CFLAGS=-Md -W
+LDFLAGS=-Md -W
 
-brmbar.com: brmbar.c defines.h
-	$(CC) $(CFLAGS) brmbar.c -o brmbar.com
+brmbar.com: brmbar.o itemio.o
+	$(CC) $(LDFLAGS) brmbar.o itemio.o -o brmbar.com
+
+brmbar.o: brmbar.c defines.h itemio.h
+	$(CC) $(CFLAGS) brmbar.c -c -o brmbar.o
+
+itemio.o: itemio.c defines.h itemio.h
+	$(CC) $(CFLAGS) itemio.c -c -o itemio.o
 
 clean:
 	rm -f brmbar.com
+	rm -f *.o
 
 run:
 	dosbox brmbar.com
diff --git a/brmbar.c b/brmbar.c
index 8d6b80c..f4e5b4d 100644
--- a/brmbar.c
+++ b/brmbar.c
@@ -1,21 +1,5 @@
-#include <stdio.h>
 #include "defines.h"
-
-struct item {
-    char ean[EAN_MAXLEN];
-    char name[NAME_MAXLEN];
-    int price;
-} items[ITEM_MAXNUM];
-
-void fill_items()
-{
-    char buf[128];
-    FILE *f = fopen("items.txt", "r");
-    while (fgets(buf, 128, f)) {
-        printf("%s\n", buf);
-   }
-    fclose(f);
-}
+#include "itemio.h"
 
 int main()
 {
diff --git a/itemio.c b/itemio.c
new file mode 100644
index 0000000..f6eb696
--- /dev/null
+++ b/itemio.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include "itemio.h"
+
+struct item items[ITEM_MAXNUM];
+
+void fill_items()
+{
+    char buf[128];
+    FILE *f = fopen("items.txt", "r");
+    while (fgets(buf, 128, f)) {
+        printf("%s\n", buf);
+    }
+    fclose(f);
+}
+
diff --git a/itemio.h b/itemio.h
new file mode 100644
index 0000000..6f304b9
--- /dev/null
+++ b/itemio.h
@@ -0,0 +1,17 @@
+#ifndef _BRMBAR_ITEMIO_H_
+#define _BRMBAR_ITEMIO_H_
+
+#include "defines.h"
+
+struct item {
+    char ean[EAN_MAXLEN];
+    char name[NAME_MAXLEN];
+    int price;
+};
+
+extern struct item items[ITEM_MAXNUM];
+
+extern void fill_items();
+
+#endif
+