diff --git a/packages/tools/bcm2835-bootloader/scripts/update.sh b/packages/tools/bcm2835-bootloader/scripts/update.sh
index a3e5589c6b..b567562dea 100755
--- a/packages/tools/bcm2835-bootloader/scripts/update.sh
+++ b/packages/tools/bcm2835-bootloader/scripts/update.sh
@@ -44,6 +44,9 @@
     mv $BOOT_ROOT/config.txt $BOOT_ROOT/config.txt.bk
     cat $SYSTEM_ROOT/usr/share/bootloader/config.txt \
         $BOOT_ROOT/config.txt.bk > $BOOT_ROOT/config.txt
+  else
+    sed -e "s,# gpu_mem_256=128,gpu_mem_256=100,g" -i $BOOT_ROOT/config.txt
+    sed -e "s,# gpu_mem_512=128,gpu_mem_512=128,g" -i $BOOT_ROOT/config.txt
   fi
 
 # mount $BOOT_ROOT r/o