diff --git a/testhal/STM32F4xx/GPT/mcuconf.h b/testhal/STM32F4xx/GPT/mcuconf.h
index 8bae1097f..26e72cf8f 100644
--- a/testhal/STM32F4xx/GPT/mcuconf.h
+++ b/testhal/STM32F4xx/GPT/mcuconf.h
@@ -114,7 +114,7 @@
 #define STM32_GPT_USE_TIM3                  TRUE
 #define STM32_GPT_USE_TIM4                  TRUE
 #define STM32_GPT_USE_TIM5                  TRUE
-#define STM32_GPT_USE_TIM8                  TRUE
+#define STM32_GPT_USE_TIM6                  TRUE
 #define STM32_GPT_USE_TIM7                  TRUE
 #define STM32_GPT_USE_TIM8                  TRUE
 #define STM32_GPT_USE_TIM9                  TRUE