diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.dts b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.dts
index 23ae87ccb11..2c30c727005 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.dts
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.dts
@@ -25,45 +25,5 @@
 	ranges = <0x0 0x20000000 DT_SIZE_K(96)>;
 };
 
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(500)>;
-};
-
-/* These partition sizes assume no FLPR area in RRAM */
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(100)>;
-		};
-
-		slot0_ns_partition: partition@29000 {
-			label = "image-0-nonsecure";
-			reg = <0x29000 DT_SIZE_K(100)>;
-		};
-
-		slot1_partition: partition@42000 {
-			label = "image-1";
-			reg = <0x42000 DT_SIZE_K(100)>;
-		};
-
-		slot1_ns_partition: partition@5b000 {
-			label = "image-1-nonsecure";
-			reg = <0x5b000 DT_SIZE_K(100)>;
-		};
-
-		storage_partition: partition@74000 {
-			label = "storage";
-			reg = <0x74000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l05_partition.dtsi>
diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.yaml b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.yaml
index 2a41fbf2ca1..cda8efcd610 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.yaml
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l05_cpuapp.yaml
@@ -10,7 +10,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 96
-flash: 100
+flash: 500
 supported:
   - adc
   - counter
diff --git a/dts/vendor/nordic/nrf54l05_partition.dtsi b/dts/vendor/nordic/nrf54l05_partition.dtsi
new file mode 100644
index 00000000000..aa2ea04bce0
--- /dev/null
+++ b/dts/vendor/nordic/nrf54l05_partition.dtsi
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&cpuapp_rram {
+	reg = <0x0 DT_SIZE_K(500)>;
+};
+
+/* These partition sizes assume no FLPR area in RRAM */
+&cpuapp_rram {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(64)>;
+		};
+
+		slot0_partition: partition@10000 {
+			label = "image-0";
+			reg = <0x10000 DT_SIZE_K(200)>;
+		};
+
+		slot1_partition: partition@42000 {
+			label = "image-1";
+			reg = <0x42000 DT_SIZE_K(200)>;
+		};
+
+		storage_partition: partition@74000 {
+			label = "storage";
+			reg = <0x74000 DT_SIZE_K(36)>;
+		};
+	};
+};