diff --git a/inc/chksum64.h b/inc/chksum64.h
new file mode 100644
index 0000000..ff8096f
--- /dev/null
+++ b/inc/chksum64.h
@@ -0,0 +1,8 @@
+
+
+#ifndef _CHKSUM64_H
+#define	_CHKSUM64_H
+
+void checksum_sdram(void);
+
+#endif
diff --git a/inc/main.h b/inc/main.h
index 7e17406..322788c 100644
--- a/inc/main.h
+++ b/inc/main.h
@@ -6,19 +6,16 @@
 #ifndef MAIN_H
 #define MAIN_H
 
-//TODO: some of these should probably be includes not protos in main
+//TODO: these should probably be static not protos in main
 void bootRom(display_context_t disp, int silent);
 void loadrom(display_context_t disp, u8 *buff, int fast);
 
 void readSDcard(display_context_t disp, char *directory);
 int saveTypeToSd(display_context_t disp, char* save_filename ,int type);
 
-void checksum_sdram(void);
-
 void drawShortInfoBox(display_context_t disp, char* text, u8 mode);
 void drawTextInput(display_context_t disp,char *msg);
 
-#define MAX_LIST        20
 
 //#define ishexchar(c) (((c >= '0') && (c <= '9')) || ((c >= 'A') && (c <= 'F')) || ((c >= 'a') && (c <= 'f')))
 
diff --git a/src/chksum64.c b/src/chksum64.c
index 338122e..5b2c2ba 100644
--- a/src/chksum64.c
+++ b/src/chksum64.c
@@ -23,6 +23,7 @@
 #include <libdragon.h>
 
 #include "sys.h"
+#include "chksum64.h"
 
 
 #define BUFSIZE 0x8000
diff --git a/src/main.c b/src/main.c
index 6eb64fc..d2623fe 100644
--- a/src/main.c
+++ b/src/main.c
@@ -44,11 +44,14 @@
 #include <yaml.h>
 
 #include "mem.h"
+#include "chksum64.h"
 
 #ifdef USE_TRUETYPE
 #define STB_TRUETYPE_IMPLEMENTATION
 #include "stb_truetype.h"
 
+#define MAX_LIST 20
+
 struct glyph
 {
     int xoff;