diff --git a/src/hgr_graphics.h b/src/hgr_graphics.h
new file mode 100644
index 0000000..4851bd9
--- /dev/null
+++ b/src/hgr_graphics.h
@@ -0,0 +1,8 @@
+#ifndef _HGR_GRAPHICS_HEADER_
+#define _HGR_GRAPHICS_HEADER_
+
+#define SCREEN_HEIGHT 192
+#define SCREEN_WIDTH_BYTES 128
+#define BYTES_PER_LINE 40
+
+#endif /* _HGR_GRAPHICS_HEADER_ */
diff --git a/src/hgr_line_data.c b/src/hgr_line_data.c
index 34d205f..95866e3 100644
--- a/src/hgr_line_data.c
+++ b/src/hgr_line_data.c
@@ -1,6 +1,6 @@
 #include <stdint.h>
 
-#include "utility.h"
+#include "hgr_graphics.h"
 
 const uint16_t line_offset_map[SCREEN_HEIGHT] = {
 	0x0000, 0x0400, 0x0800, 0x0C00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x0080, 0x0480, 0x0880, 0x0C80,
diff --git a/src/hgr_line_data.h b/src/hgr_line_data.h
index 145b920..9466fe5 100644
--- a/src/hgr_line_data.h
+++ b/src/hgr_line_data.h
@@ -2,7 +2,8 @@
 #define _HGR_LINE_DATA_HEADER_
 
 #include <stdint.h>
-#include "utility.h"
+
+#include "hgr_graphics.h"
 
 extern const uint16_t line_offset_map[SCREEN_HEIGHT];
 
diff --git a/src/utility.h b/src/utility.h
index 2195052..96fc869 100644
--- a/src/utility.h
+++ b/src/utility.h
@@ -3,10 +3,6 @@
 
 #include <stdint.h>
 
-#define SCREEN_HEIGHT 192
-#define SCREEN_WIDTH_BYTES 128
-#define BYTES_PER_LINE 40
-
 #define PEEKZ(a) (*(volatile uint8_t* __attribute__((zpage)))(a))
 #define POKEZ(a, b) ((*(volatile uint8_t* __attribute__((zpage)))(a)) = b)