diff --git a/sys/mips/conf/ROUTERSTATION.hints b/sys/mips/conf/ROUTERSTATION.hints
index 7b35b229af30..c5740c035d8f 100644
--- a/sys/mips/conf/ROUTERSTATION.hints
+++ b/sys/mips/conf/ROUTERSTATION.hints
@@ -46,3 +46,7 @@ hint.gpioled.0.at="gpiobus0"
 hint.gpioled.0.name="rf"
 # pin 2
 hint.gpioled.0.pins=0x0004
+
+# Override this to ensure we definitely point to the last 64K of the
+# 16MiB flash chip in case underlying block size of the flash driver changes.
+hint.redboot.0.fisoffset="0xff0000"
diff --git a/sys/mips/conf/RSPRO.hints b/sys/mips/conf/RSPRO.hints
index a802328db3b5..6ed26ec0b9e6 100644
--- a/sys/mips/conf/RSPRO.hints
+++ b/sys/mips/conf/RSPRO.hints
@@ -47,3 +47,7 @@ hint.gpioled.0.at="gpiobus0"
 hint.gpioled.0.name="rf"
 # pin 2
 hint.gpioled.0.pins=0x0004
+
+# Override this to ensure we definitely point to the last 64K of the
+# 16MiB flash chip in case underlying block size of the flash driver changes.
+hint.redboot.0.fisoffset="0xff0000"