diff --git a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_release.c b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_release.c
index 6a9eabba..5ff70b2a 100644
--- a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_release.c
+++ b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_release.c
@@ -214,7 +214,7 @@ static void prvTask3( void * pvParameters ) {
         xSemaphoreTake(xMutex, portMAX_DELAY); // wost time: right after T2 locks the mutex
         volatile uint16_t x = INPUT_SHORT_NEXT;
         int torun = 0;
-        if ((int)y>=0) {
+        if ((int)y!=0) {
             torun = CLAMP(x, 0, 5000);
         } else {
             torun = CLAMP(x, 1000, 4000);