diff --git a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f302x8 b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f302x8
index 4a59ace1c01..f1bb4328b60 100644
--- a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f302x8
+++ b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f302x8
@@ -11,10 +11,6 @@ config SOC
 	string
 	default "stm32f302x8"
 
-config FLASH_PAGE_SIZE
-	hex
-	default 0x800
-
 config NUM_IRQS
 	int
 	default 82
diff --git a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f303xc b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f303xc
index ff5eec00c13..380de7aa393 100644
--- a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f303xc
+++ b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f303xc
@@ -11,10 +11,6 @@ config SOC
 	string
 	default "stm32f303xc"
 
-config FLASH_PAGE_SIZE
-	hex
-	default 0x800
-
 config NUM_IRQS
 	int
 	default 82
diff --git a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f334x8 b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f334x8
index 965ed0ed2a3..059e59459ba 100644
--- a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f334x8
+++ b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f334x8
@@ -11,10 +11,6 @@ config SOC
 	string
 	default "stm32f334x8"
 
-config FLASH_PAGE_SIZE
-	hex
-	default 0x800
-
 config NUM_IRQS
 	int
 	default 82
diff --git a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f373xc b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f373xc
index 777683489be..0657524676e 100644
--- a/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f373xc
+++ b/soc/arm/st_stm32/stm32f3/Kconfig.defconfig.stm32f373xc
@@ -11,10 +11,6 @@ config SOC
 	string
 	default "stm32f373xc"
 
-config FLASH_PAGE_SIZE
-	hex
-	default 0x800
-
 config NUM_IRQS
 	int
 	default 82