diff --git a/firmware/export/dm320.h b/firmware/export/dm320.h
index 4a1b7246d5..4d6b9ac08b 100644
--- a/firmware/export/dm320.h
+++ b/firmware/export/dm320.h
@@ -32,9 +32,9 @@
 /* must be 16Kb (0x4000) aligned */
 #if 0
 #define MEM_END          0x00900000 + (MEM*0x00100000)
-#define TTB_BASE         ((unsigned int *)(MEM_END - TTB_SIZE)) /* End of memory */
+#define TTB_BASE         ((unsigned long *)(MEM_END - TTB_SIZE)) /* End of memory */
 #else
-#define TTB_BASE         ((unsigned int *)(0x04900000 - TTB_SIZE)) /* End of memory */
+#define TTB_BASE         ((unsigned long *)(0x04900000 - TTB_SIZE)) /* End of memory */
 #endif
 #define FRAME            ((short *) ((char*)TTB_BASE - LCD_BUFFER_SIZE))  /* Right before TTB */
 
diff --git a/firmware/export/imx31l.h b/firmware/export/imx31l.h
index f41381c8eb..6780a5a43f 100755
--- a/firmware/export/imx31l.h
+++ b/firmware/export/imx31l.h
@@ -31,7 +31,7 @@
 #define TTB_BASE_ADDR (0x80100000 + 0x00100000 - TTB_SIZE)
 #define TTB_SIZE      (0x4000)
 #define IRAM_SIZE     (0x4000)
-#define TTB_BASE      ((unsigned int *)TTB_BASE_ADDR)
+#define TTB_BASE      ((unsigned long *)TTB_BASE_ADDR)
 #define FRAME         ((void*)0x03f00000)
 #define FRAME_SIZE    (240*320*2)