diff --git a/src/flash/nor/core.c b/src/flash/nor/core.c
index 8b581b0c5..18012c650 100644
--- a/src/flash/nor/core.c
+++ b/src/flash/nor/core.c
@@ -36,7 +36,7 @@
  * primarily support access from Tcl scripts or from GDB.
  */
 
-struct flash_bank *flash_banks;
+static struct flash_bank *flash_banks;
 
 int flash_driver_erase(struct flash_bank *bank, int first, int last)
 {