diff --git a/baseflight.uvproj b/baseflight.uvproj
index d182104825..51e4d102c5 100755
--- a/baseflight.uvproj
+++ b/baseflight.uvproj
@@ -165,6 +165,7 @@
             <Capability>1</Capability>
             <DriverSelection>4096</DriverSelection>
           </Flash1>
+          <bUseTDR>0</bUseTDR>
           <Flash2>BIN\UL2CM3.DLL</Flash2>
           <Flash3>"" ()</Flash3>
           <Flash4></Flash4>
@@ -970,6 +971,7 @@
             <Capability>1</Capability>
             <DriverSelection>4096</DriverSelection>
           </Flash1>
+          <bUseTDR>0</bUseTDR>
           <Flash2>BIN\UL2CM3.DLL</Flash2>
           <Flash3>"" ()</Flash3>
           <Flash4></Flash4>
@@ -1719,6 +1721,7 @@
             <Capability>1</Capability>
             <DriverSelection>4096</DriverSelection>
           </Flash1>
+          <bUseTDR>0</bUseTDR>
           <Flash2>BIN\UL2CM3.DLL</Flash2>
           <Flash3>"" ()</Flash3>
           <Flash4></Flash4>
diff --git a/src/drv_system.c b/src/drv_system.c
index d19b0ada63..f43283c8f4 100755
--- a/src/drv_system.c
+++ b/src/drv_system.c
@@ -33,7 +33,7 @@ uint32_t micros(void)
         ms = sysTickUptime;
         cycle_cnt = SysTick->VAL;
     } while (ms != sysTickUptime);
-    return (ms * 1000) + (72000 - cycle_cnt) / 72;
+    return (ms * 1000) + (usTicks * 1000 - cycle_cnt) / usTicks;
 }
 
 // Return system uptime in milliseconds (rollover in 49 days)