diff --git a/dts/arm/st/stm32f4.dtsi b/dts/arm/st/stm32f4.dtsi
index 638c2738b08..23f4174df07 100644
--- a/dts/arm/st/stm32f4.dtsi
+++ b/dts/arm/st/stm32f4.dtsi
@@ -23,7 +23,10 @@
 	};
 
 	flash0: flash@8000000 {
+		compatible = "soc-nv-flash";
 		reg = <0x08000000 DT_FLASH_SIZE>;
+
+		write-block-size = <1>;
 	};
 
 	sram0: memory@20000000 {