diff --git a/src/main/config/config_streamer.c b/src/main/config/config_streamer.c
index dc512d3ae0..cf2b35fe38 100644
--- a/src/main/config/config_streamer.c
+++ b/src/main/config/config_streamer.c
@@ -36,49 +36,8 @@ uint8_t eepromData[EEPROM_SIZE];
 #endif
 
 
-#if (defined(STM32H750xx) || defined(STM32H730xx)) && !(defined(CONFIG_IN_EXTERNAL_FLASH) || defined(CONFIG_IN_MEMORY_MAPPED_FLASH) || defined(CONFIG_IN_RAM) || defined(CONFIG_IN_SDCARD))
-#error "The configured MCU only has one flash page which contains the bootloader, no spare flash pages available, use external storage for persistent config or ram for target testing"
-#endif
-// @todo this is not strictly correct for F4/F7, where sector sizes are variable
 #if !defined(FLASH_PAGE_SIZE)
-// F4
-#if defined(STM32F40_41xxx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x4000) // 16K sectors
-# elif defined(STM32F411xE)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x4000)
-# elif defined(STM32F427_437xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x4000)
-# elif defined(STM32F446xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x4000)
-# elif defined(AT32F435ZMT7) || defined(AT32F435RMT7)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x1000) // 4K sectors
-# elif defined(AT32F435RGT7)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x0800) // 2K sectors
-// F7
-#elif defined(STM32F722xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x4000) // 16K sectors
-# elif defined(STM32F745xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x8000) // 32K sectors
-# elif defined(STM32F746xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x8000)
-# elif defined(STM32F765xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x8000)
-# elif defined(UNIT_TEST)
-#  define FLASH_PAGE_SIZE                 (0x400)
-// H7
-# elif defined(STM32H743xx) || defined(STM32H750xx) || defined(STM32H723xx) || defined(STM32H725xx) || defined(STM32H730xx)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x20000) // 128K sectors
-# elif defined(STM32H7A3xx) || defined(STM32H7A3xxQ)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x2000) // 8K sectors
-// G4
-# elif defined(STM32G4)
-#  define FLASH_PAGE_SIZE                 ((uint32_t)0x800) // 2K page
-// SIMULATOR
-# elif defined(SIMULATOR_BUILD)
-#  define FLASH_PAGE_SIZE                 (0x400)
-# else
-#  error "Flash page size not defined for target."
-# endif
+#error "Flash page size not defined for target."
 #endif
 
 void config_streamer_init(config_streamer_t *c)
diff --git a/src/main/target/AT32F435/target.h b/src/main/target/AT32F435/target.h
index 80a1603596..3f50749e4f 100644
--- a/src/main/target/AT32F435/target.h
+++ b/src/main/target/AT32F435/target.h
@@ -87,3 +87,5 @@
 #undef USE_FLASH
 #undef USE_FLASHFS
 #undef USE_FLASH_CHIP
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x1000) // 4K sectors
diff --git a/src/main/target/SITL/target.h b/src/main/target/SITL/target.h
index bc75d4dd2d..aaf8677ddd 100644
--- a/src/main/target/SITL/target.h
+++ b/src/main/target/SITL/target.h
@@ -155,6 +155,8 @@
 
 #define DEFIO_NO_PORTS   // suppress 'no pins defined' warning
 
+#define FLASH_PAGE_SIZE (0x400)
+
 // belows are internal stuff
 
 extern uint32_t SystemCoreClock;
diff --git a/src/main/target/STM32F405/target.h b/src/main/target/STM32F405/target.h
index 4de47a259d..67182bc701 100644
--- a/src/main/target/STM32F405/target.h
+++ b/src/main/target/STM32F405/target.h
@@ -80,3 +80,5 @@
 
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x4000) // 16K sectors
diff --git a/src/main/target/STM32F411/target.h b/src/main/target/STM32F411/target.h
index cb5a213ed9..6d8e6f34d5 100644
--- a/src/main/target/STM32F411/target.h
+++ b/src/main/target/STM32F411/target.h
@@ -77,3 +77,5 @@
 
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x4000) // 16K sectors
diff --git a/src/main/target/STM32F745/target.h b/src/main/target/STM32F745/target.h
index f1e7c54eb4..4d39c06a31 100644
--- a/src/main/target/STM32F745/target.h
+++ b/src/main/target/STM32F745/target.h
@@ -87,3 +87,5 @@
 
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x8000) // 32K sectors
diff --git a/src/main/target/STM32F7X2/target.h b/src/main/target/STM32F7X2/target.h
index 62a63d2cfe..c4980bd9fa 100644
--- a/src/main/target/STM32F7X2/target.h
+++ b/src/main/target/STM32F7X2/target.h
@@ -79,3 +79,5 @@
 
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x4000) // 16K sectors
diff --git a/src/main/target/STM32G47X/target.h b/src/main/target/STM32G47X/target.h
index d3bd73b4cd..76c665fe80 100644
--- a/src/main/target/STM32G47X/target.h
+++ b/src/main/target/STM32G47X/target.h
@@ -79,3 +79,4 @@
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
 #define USE_TIMER_UP_CONFIG
+
diff --git a/src/main/target/STM32H723/target.h b/src/main/target/STM32H723/target.h
index 9e87c51fb9..eaa67ec45d 100644
--- a/src/main/target/STM32H723/target.h
+++ b/src/main/target/STM32H723/target.h
@@ -102,3 +102,5 @@
 
 #define USE_EXTI
 #define USE_TIMER_UP_CONFIG
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x20000) // 128K sectors
diff --git a/src/main/target/STM32H730/target.h b/src/main/target/STM32H730/target.h
index 528768ff8f..35ca8b289a 100644
--- a/src/main/target/STM32H730/target.h
+++ b/src/main/target/STM32H730/target.h
@@ -114,3 +114,9 @@
 
 #define USE_EXTI
 #define USE_TIMER_UP_CONFIG
+
+#if !(defined(CONFIG_IN_EXTERNAL_FLASH) || defined(CONFIG_IN_MEMORY_MAPPED_FLASH) || defined(CONFIG_IN_RAM) || defined(CONFIG_IN_SDCARD))
+#error "The configured MCU only has one flash page which contains the bootloader, no spare flash pages available, use external storage for persistent config or ram for target testing"
+#endif
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x20000) // 128K sectors
diff --git a/src/main/target/STM32H743/target.h b/src/main/target/STM32H743/target.h
index 9b6ae57acc..2f38f1865c 100644
--- a/src/main/target/STM32H743/target.h
+++ b/src/main/target/STM32H743/target.h
@@ -88,3 +88,5 @@
 #define USE_CUSTOM_DEFAULTS
 #define USE_EXTI
 #define USE_TIMER_UP_CONFIG
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x20000) // 128K sectors
diff --git a/src/main/target/STM32H750/target.h b/src/main/target/STM32H750/target.h
index 6adc709c97..09ab773657 100644
--- a/src/main/target/STM32H750/target.h
+++ b/src/main/target/STM32H750/target.h
@@ -109,3 +109,9 @@
 
 #define USE_EXTI
 #define USE_TIMER_UP_CONFIG
+
+#if !(defined(CONFIG_IN_EXTERNAL_FLASH) || defined(CONFIG_IN_MEMORY_MAPPED_FLASH) || defined(CONFIG_IN_RAM) || defined(CONFIG_IN_SDCARD))
+#error "The configured MCU only has one flash page which contains the bootloader, no spare flash pages available, use external storage for persistent config or ram for target testing"
+#endif
+
+#define FLASH_PAGE_SIZE ((uint32_t)0x20000) // 128K sectors