diff --git a/drivers/flash/flash_rpi_pico.c b/drivers/flash/flash_rpi_pico.c
index e9a386b06a0..01ace5f68b5 100644
--- a/drivers/flash/flash_rpi_pico.c
+++ b/drivers/flash/flash_rpi_pico.c
@@ -61,6 +61,7 @@ enum outover {
 static ssi_hw_t *const ssi = (ssi_hw_t *)SSI_BASE_ADDRESS;
 static uint32_t boot2_copyout[BOOT2_SIZE_WORDS];
 static bool boot2_copyout_valid;
+static uint8_t flash_ram_buffer[PAGE_SIZE];
 
 static void __no_inline_not_in_flash_func(flash_init_boot2_copyout)(void)
 {
@@ -223,22 +224,25 @@ static int flash_rpi_write(const struct device *dev, off_t offset, const void *d
 
 	if ((offset & (PAGE_SIZE - 1)) > 0) {
 		bytes_to_write = MIN(PAGE_SIZE - (offset & (PAGE_SIZE - 1)), size);
-		flash_write_partial(offset, data_pointer, bytes_to_write);
+		memcpy(flash_ram_buffer, data_pointer, bytes_to_write);
+		flash_write_partial(offset, flash_ram_buffer, bytes_to_write);
 		data_pointer += bytes_to_write;
 		size -= bytes_to_write;
 		offset += bytes_to_write;
 	}
 
-	if (size >= PAGE_SIZE) {
-		bytes_to_write = size & ~(PAGE_SIZE - 1);
-		flash_range_program(offset, data_pointer, bytes_to_write);
+	while (size >= PAGE_SIZE) {
+		bytes_to_write = PAGE_SIZE;
+		memcpy(flash_ram_buffer, data_pointer, bytes_to_write);
+		flash_range_program(offset, flash_ram_buffer, bytes_to_write);
 		data_pointer += bytes_to_write;
 		size -= bytes_to_write;
 		offset += bytes_to_write;
 	}
 
 	if (size > 0) {
-		flash_write_partial(offset, data_pointer, size);
+		memcpy(flash_ram_buffer, data_pointer, size);
+		flash_write_partial(offset, flash_ram_buffer, size);
 	}
 
 	irq_unlock(key);