diff --git a/bsps/arm/stm32h7/boards/stm/stm32h750b-dk/system_stm32h7xx.c b/bsps/arm/stm32h7/boards/stm/stm32h750b-dk/system_stm32h7xx.c
index 467d9d5026..8f1da2d238 100644
--- a/bsps/arm/stm32h7/boards/stm/stm32h750b-dk/system_stm32h7xx.c
+++ b/bsps/arm/stm32h7/boards/stm/stm32h750b-dk/system_stm32h7xx.c
@@ -131,6 +131,8 @@
 #if defined (DATA_IN_ExtSDRAM)
   static void SystemInit_ExtMemCtl(void);
 #endif /* DATA_IN_ExtSDRAM */
+#else
+#include <bsp.h>
 #endif
 
 /**
diff --git a/bsps/arm/stm32h7/include/bsp.h b/bsps/arm/stm32h7/include/bsp.h
index 6b0c7bd7f6..44121e0f1d 100644
--- a/bsps/arm/stm32h7/include/bsp.h
+++ b/bsps/arm/stm32h7/include/bsp.h
@@ -63,6 +63,7 @@ void stm32h7_init_oscillator(void);
 void stm32h7_init_clocks(void);
 void stm32h7_init_peripheral_clocks(void);
 void stm32h7_init_qspi(void);
+void SystemInit_ExtMemCtl(void);
 
 /** @} */