diff --git a/stm50flw0x0x.c b/stm50flw0x0x.c
index 80f518e..60e5c45 100644
--- a/stm50flw0x0x.c
+++ b/stm50flw0x0x.c
@@ -39,7 +39,7 @@
 static int unlock_block_stm50flw0x0x(struct flashchip *flash, int offset)
 {
 	chipaddr wrprotect = flash->virtual_registers + 2;
-	const uint8_t unlock_sector = 0x00;
+	static const uint8_t unlock_sector = 0x00;
 	int j;
 
 	/*