diff --git a/GorgonMeducer.perf_counter.pdsc b/GorgonMeducer.perf_counter.pdsc
index ca9c3af..59b2809 100644
--- a/GorgonMeducer.perf_counter.pdsc
+++ b/GorgonMeducer.perf_counter.pdsc
@@ -16,8 +16,10 @@
   <repository type="git">https://github.com/GorgonMeducer/perf_counter.git</repository>
   
   <releases>
-    <release date="2022-07-08" version="1.9.8-dev2" url="https://raw.githubusercontent.com/GorgonMeducer/perf_counter/CMSIS-Pack/cmsis-pack/GorgonMeducer.perf_counter.1.9.8-dev2.pack">
+    <release date="2022-07-08" version="1.9.8" url="https://raw.githubusercontent.com/GorgonMeducer/perf_counter/CMSIS-Pack/cmsis-pack/GorgonMeducer.perf_counter.1.9.8.pack">
       - Improve delay accuracy
+      - Fix RT-Thread stack-fully-used issue
+      - introduce macro __PERF_COUNTER_CFG_USE_SYSTICK_WRAPPER__
     </release>
     <release date="2022-06-15" version="1.9.6" url="https://github.com/GorgonMeducer/perf_counter/raw/88c8db41730d0f4ab84708e828398ecaab434e24/cmsis-pack/GorgonMeducer.perf_counter.1.9.6.pack">
       - Add RT-Thread Package
@@ -175,7 +177,7 @@
   -->
 
     <components>
-        <bundle Cbundle="Performance Counter" Cclass="Utilities" Cversion="1.9.6">
+        <bundle Cbundle="Performance Counter" Cclass="Utilities" Cversion="1.9.8">
             <description>A dedicated performance counter for Cortex-M systick.</description>
             <doc>documents/Doxygen/html/index.html</doc>
             <component Cgroup="perf_counter" Csub="Core" Cvariant="Library" isDefaultVariant="true" condition="CMSIS-CORE">
@@ -188,6 +190,7 @@
               <RTE_Components_h>
 
 #define __PERF_COUNTER__
+#define __PERF_COUNTER_CFG_USE_SYSTICK_WRAPPER__
               </RTE_Components_h>
             </component>
 
@@ -202,6 +205,7 @@
               <RTE_Components_h>
 
 #define __PERF_COUNTER__
+#define __PERF_COUNTER_CFG_USE_SYSTICK_WRAPPER__
               </RTE_Components_h>
             </component>
             
diff --git a/README.md b/README.md
index 3e1b87b..b3c0735 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# perf_counter (v1.9.8-dev)
+# perf_counter (v1.9.8)
 A dedicated performance counter for Cortex-M Systick. It shares the SysTick with users' original SysTick function(s) without interfering with it. This library will bring new functionalities, such as performance counter,` delay_us` and `clock()` service defined in `time.h`.
 
 ### Features:
@@ -203,14 +203,6 @@ void SysTick_Handler(void)
     ...
 }
 ```
-Implement an empty funciton `__ensure_systick_wrapper()` as there is no wrapper actually used in this deployment method:
-
-```c
-void __ensure_systick_wrapper(void)
-{
-}
-```
-
 
 
 7. Make sure the `SystemCoreClock` is updated with the same value as CPU frequency. 
diff --git a/perf_counter.c b/perf_counter.c
index b1310ec..d90c514 100644
--- a/perf_counter.c
+++ b/perf_counter.c
@@ -236,12 +236,14 @@ void init_cycle_counter(bool bIsSysTickOccupied)
     s_lSystemClockCounts = 0;                       // reset system cycle counter
     s_nSystemMS = 0;                                // reset system millisecond counter
 
+#if defined(__PERF_COUNTER_CFG_USE_SYSTICK_WRAPPER__)
 #if     defined(__IS_COMPILER_ARM_COMPILER_5__)                                 \
     ||  defined(__IS_COMPILER_ARM_COMPILER_6__)                                 \
     ||  defined(__IS_COMPILER_GCC__)                                            \
     ||  defined(__IS_COMPILER_LLVM__)
     extern void __ensure_systick_wrapper(void);
     __ensure_systick_wrapper();
+#endif
 #endif
 
     __perf_os_patch_init();