diff --git a/firmware/target/arm/s5l8702/system-s5l8702.c b/firmware/target/arm/s5l8702/system-s5l8702.c
index b9d8094b3f..4a8f47e59e 100644
--- a/firmware/target/arm/s5l8702/system-s5l8702.c
+++ b/firmware/target/arm/s5l8702/system-s5l8702.c
@@ -25,8 +25,6 @@
 #include "system-target.h"
 #include "pmu-target.h"
 
-extern long sleepin, slept;
-
 #define default_interrupt(name) \
   extern __attribute__((weak,alias("UIRQ"))) void name (void)
 
@@ -190,8 +188,6 @@ void irq_handler(void)
     asm volatile(   "stmfd sp!, {r0-r7, ip, lr} \n"   /* Store context */
                     "sub   sp, sp, #8           \n"); /* Reserve stack */
 
-    if (sleepin) slept += USEC_TIMER - sleepin;
-    sleepin = 0;
     void* dummy = VIC0ADDRESS;
     dummy = VIC1ADDRESS;
     uint32_t irqs0 = VIC0IRQSTATUS;