diff --git a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_polycopter.c b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_polycopter.c
index 3ca33f5a..dc6b2c14 100644
--- a/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_polycopter.c
+++ b/FreeRTOS/Demo/CORTEX_M3_MPS2_QEMU_GCC/main_polycopter.c
@@ -503,7 +503,7 @@ void ISR_0_Handler(void) {
     x = WC_SWITCH(x, 50);
     WASTE_USEC(x);
     BaseType_t xHigherPriorityTaskWoken = pdFALSE;
-    vTaskNotifyFromISR(xTask_CopterControlTask, MAKE_OUTPUT, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
+    xTaskNotifyFromISR(xTask_CopterControlTask, MAKE_OUTPUT, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
     inp = INPUT_SHORT_NEXT;
     x = STRETCH_i32(inp);
     x = FUNCTION_10(x);