diff --git a/Lab4/Makefile b/Lab4/Makefile
index 6b33427b4bca77a7a229e0bac0ba93d69e4bfd5b..723f40c3f52b25b155f65c66a1cce521bc26a890 100644
--- a/Lab4/Makefile
+++ b/Lab4/Makefile
@@ -11,7 +11,7 @@ stm32l4xx_hal_dma.o stm32l4xx_hal_uart.o stm32l4xx_hal_uart_ex.o
 
 # Tool path
 
-TOOLROOT		=/usr/bin
+TOOLROOT		=/opt/gcc-arm.none-eabi/bin
 
 # Library path