diff --git a/ports/stm32/boards/ARDUINO_GIGA/stm32h7xx_hal_conf.h b/ports/stm32/boards/ARDUINO_GIGA/stm32h7xx_hal_conf.h
index 71cbac4765d3..708e5432e4b3 100644
--- a/ports/stm32/boards/ARDUINO_GIGA/stm32h7xx_hal_conf.h
+++ b/ports/stm32/boards/ARDUINO_GIGA/stm32h7xx_hal_conf.h
@@ -14,8 +14,6 @@
 #define HSE_STARTUP_TIMEOUT (5000)
 #define LSE_STARTUP_TIMEOUT (5000)
 
-#define DATA_CACHE_ENABLE           1
-#define INSTRUCTION_CACHE_ENABLE    1
 #define DATA_CACHE_ENABLE           1
 #define INSTRUCTION_CACHE_ENABLE    1
 #define PREFETCH_ENABLE             1