diff --git a/firmware/export/s5l8700.h b/firmware/export/s5l8700.h
index 853b672500..dc03553984 100644
--- a/firmware/export/s5l8700.h
+++ b/firmware/export/s5l8700.h
@@ -304,8 +304,9 @@
 #define TDDATA1                 (*(REG32_PTR_T)(0x3C70006C))     /* Data1 Register */
 #define TDPRE                   (*(REG32_PTR_T)(0x3C700070))     /* Pre-scale register */
 #define TDCNT                   (*(REG32_PTR_T)(0x3C700074))     /* Counter register */
-#define USEC_TIMER              (((*(REG32_PTR_T)(0x3C700080) << 32) \
-                                | *(REG32_PTR_T)(0x3C700084)) * 5) /* 64bit 5usec timer */     
+#define FIVE_USEC_TIMER         ((*(REG32_PTR_T)(0x3C700080) << 32) \
+                                | *(REG32_PTR_T)(0x3C700084))    /* 64bit 5usec timer */     
+#define USEC_TIMER              (*(REG32_PTR_T)(0x3C700084) * 5) /* lower 32 bits of the above as a usec timer */     
 
 /* 12. NAND FLASH CONTROLER */
 #if CONFIG_CPU==S5L8701